I can understand the mindset, but I worry most people don’t think like this.
The thing is, that small rewards for “donations” will likely make the people much more willing to spend money in the first place. Even if it’s as small as a sticker on someone else’s post that costs the servers involved like a handful of API calls. But when a 1€ award is 3x as popular as the 1€ donation, it will greatly increase the funds available to the instance and, hence better servers, more features etc