Did you happen to notice that all of those sutta quotes come from the Anguttara Nikaya?
Yes, I did notice that, but there are suttas on the merits of giving from the other Nikiyas as well.
Thanissaro has provided these:
...So Prince Payasi established a donation for brahmans, contemplatives, indigents, hoboes, paupers, & beggars. And in that donation he gave food of this sort: unhusked rice porridge together with pickle brine. And he gave rough cloth with knotted fringe. Now a brahman youth named Uttara was the superintendent of that donation. As he was giving the donation he dedicated it in this way:"Through this donation may I be associated with Prince Payasi in this life, but not in the next." Prince Payasi heard that Uttara, when giving the donation, dedicated it in this way: "Through this donation may I be associated with Prince Payasi in this life, but not in the next." So, having summoned him, he said to him, "Is it true, dear boy, that when giving the donation you dedicated in this way: 'Through this donation may I be associated with Prince Payasi in this life, but not in the next'?"
"Yes, sir."
"But why do you dedicate it in this way...? Don't we who wish to gain merit hope for the fruit of our donation?"
"But, sir, the food in the donation is like this: unhusked rice porridge together with pickle brine. You wouldn't want to touch it with your foot, much less eat it. And the rough cloth with knotted fringe: You wouldn't want to touch it with your foot, much less wear it. You are dear & charming to us, so how can we connect what is dear & charming with what is not charming?"
"Then in that case, my dear boy, establish [a donation with] the sort of food that I eat and the sort of cloth that I wear."
Responding, "Yes, sir," Uttara the brahman youth established [a donation with] the sort of food that Prince Payasi ate and the sort of cloth that Prince Payasi wore. Then Prince Payasi — having given the donation inattentively, having given the donation not with his own hand, having given the donation thoughtlessly, having given the donation as if he were throwing it away — on the break-up of the body, after death, reappeared in the company of the devas of the Four Great Kings in the empty Serisaka palace. But Uttara, the brahman youth who was the superintendent of the donation — having given the donation attentively, having given the donation with his own hand, having given the donation thoughtfully, having given the donation not as if he were throwing it away — on the break-up of the body, after death, reappeared in the good destination, the heavenly world, in the company of the [higher] devas of the Thirty-three.
—
DN 23...Then another deva exclaimed in the Blessed One's presence:
Giving is good, dear sir!
Even when there's next to nothing,
giving is good.
Giving with conviction is good!
The giving of what's righteously gained
is good!
And further:
Giving with discretion is good!
It's praised by the One Well-gone:
giving with discretion,
to those worthy of offerings
here in the world of the living.
What's given to them bears great fruit
like seeds sown in a good field.
—
SN 1.33"If beings knew, as I know, the results of giving and sharing, they would not eat without have given, nor would the stain of miserliness overcome their minds. Even if it were their last bite, their last mouthful, they would not eat without having shared, if there were someone to receive their gift. But because beings do not know, as I know, the results of giving and sharing, they eat without have given. The stain of miserliness overcomes their minds."
—
Iti 26Asibandhakaputta the headman said to the Blessed One, "Venerable sir, doesn't the Blessed One in many ways praise kindness, protection, & sympathy for families?"
"Yes, headman, the Tathagata in many ways praises kindness, protection, & sympathy for families."
"Then how, venerable sir, is the Blessed One, together with a large community of monks, wandering on tour around Nalanda in the midst of famine, a time of scarcity, when the crops are white with blight and turned to straw? The Blessed One is practicing for the ruin of families. The Blessed One is practicing for the demise of families. The Blessed One is practicing for the downfall of families."
"Headman, recollecting back over 91 aeons, I do not know any family to have been brought to downfall through the giving of cooked alms. On the contrary: Whatever families are rich, with much wealth, with many possessions, with a great deal of money, a great many accoutrements of wealth, a great many commodities, all have become so from giving, from truth, from restraint."
—
SN 42.9
What the miser fears,
that keeps him from giving,
is the very danger that comes
when he doesn't give.
—
SN 1.32Then a certain devata, in the far extreme of the night, her extreme radiance lighting up the entirety of Jeta's Grove, went to the Blessed One and, on arrival, having bowed down to him, stood to one side. As she was standing there, she recited these verses in the Blessed One's presence:
When a house is on fire,
the vessel salvaged
is the one that will be of use,
not the one left there to burn.
So when the world is on fire
with aging & death,
you should salvage [your wealth] by giving:
what's given is well salvaged.
What's given bears fruit as pleasure.
What isn't given does not:
Thieves take it away, or kings;
it gets burnt by fire or lost.
Then in the end
you leave the body
together with your possessions.
Knowing this, the intelligent man
enjoys possessions & gives.
Having enjoyed & given
in line with your means,
uncensured you go
to the heavenly state.
—
SN 1.41A person stashes a fund away,
deep underground, at the water line:
"When a need or duty arises,
this will provide for my needs,
for my release if I'm denounced by the king,
molested by thieves,
in case of debt, famine, or accidents."
With aims like this
in the world
a reserve fund is stashed away.
But no matter how well it's stored,
deep underground, at the water line,
it won't all always serve one's need.
The fund gets shifted from its place,
or one's memory gets confused;
or — unseen —
water serpents make off with it,
spirits steal it,
or hateful heirs run off with it.
When one's merit's ended,
it's totally destroyed.
But when a man or woman
has laid aside a well-stored fund
of generosity, virtue,
restraint, & self-control,
with regard to a shrine,
the Sangha,
a fine individual,
guests,
mother, father,
or elder sibling:
That's a well-stored fund.
It can't be wrested away.
It follows you along.
When, having left this world,
for wherever you must go,
you take it with you.
This fund is not held in common with others,
& cannot be stolen by thieves.
So, enlightened, you should make merit,
the fund that will follow you along.
This is the fund
that gives all they want
to beings human, divine.
—
Khp 8