I think I'd rather have a script I could put on a Raspberry Pi that periodically did actions on their site or via APIs to waste their computing power. If a few

I think I'd rather have a script I could put on a Raspberry Pi that periodically did actions on their site or via APIs to waste their computing power. If a few million people did that, it might make a difference. Sure, they'd try to block it, but maintainers could evolve the software, like ad blockers do.