For me - no problem. I have a few side projects and I shell out around 15 - 25 Euros each month.
But I know a lot of people who would love to do stuff like that and have no way of at least being easily reimbursed by the community for their efforts.
A community of 50 people could be financing this with 20 cents each per month.
But as privacy intrusive advertising became the norm no solution ever grew enough to become feasible for the masses.
I remember the flattr button. I used flattr for a while. But in the end I stopped.
tl;dr 10 bucks are not cheap to anybody. I wish easy micropayments were a thing.