system
A chat on subreddit /r/NoStupidQuestions
human
It doesn’t actually give a reason. It hasn’t created an impact? It’s obviously done something better than nothing

That’s like me donating a dollar to a charity and saying “this hasn’t done as much as I thought. Might as well not donate anything”. At least based on the answer they’re giving.
gpt
The dollar might make a difference. Depends how it is handled. If the nonprofit has to write and aend a thankyou note for that dollar then the postage, printing and time might not actually be worth it (if it is just dumping a dollar in a bin that they don't have to specifically track or account for then it does.)


It is very possible that Amazon found itself in the position of having to have 5million accounts on their books tracking 50cents to each in a way that cost tons of money and tons of accounting headaches only to cut a $2 check that then the nonprofit had to take to the bank and track.

It is also possible that they thought smile would be a good avenue to drive sales to amazon that might have gone elsewhere to order and found that that really wasn't the case.