I mean, I have a whole list of projects I would like to support in a meaningful way through a subscription for some service, but it seems finding a way to do this is itself a hoop to jump through. Even if I'm super benevolent maybe I'm not willing to do HR/accounting work in order to exercise my benevolence.
I know about Gittip and the like, but if you're a business (the only kind of entity with meaningful money to throw at this problem), you'd rather have a clearcut way to pay for a service, not a platform for dropping pennies.