Reddit has always been a place where you can find spontaneous generosity with a fun twist. Just one example: there was a popular sub many years ago called "randomactsofpizza" where Redditors would send pizza to other Redditors who were hungry or down on their luck.
I don't know why we should assume Redditors are less charitable than people at large when if anything they've demonstrated otherwise.
The subreddit is /r/Random_Acts_Of_Pizza and still in operation. /r/RandomActsOfPizza was a copycat started with the explicit purpose of bartering nudes for pizza (forbidden in the original). It was later shut down when it turned out it was run by a scammer.
On the gorilla front, the AR15 subreddit helped the anti-poaching squads with technical advice and parts to help protect gorillas.
It's a good venue for charity and people helping others.
No one who has spent much time with humans should be shocked that the same people are also sardonic assholes at times.
There is still an imgur user doing this regularly.
I think username is pizzaguy
They used to do it on their own, and now they organise pizza nights, where a bunch of users sign up to donate, and those who need pizza sign up to receive.
I don't know why we should assume Redditors are less charitable than people at large when if anything they've demonstrated otherwise.