The problem is if I was going to do that with the open source projects I use, it is more like a penny a month * 1000 projects.
This is why I feel like a missing piece of Patreon/Kofi/whatever is the ability to say "Here's $x; divide it automagically amongst the creators I'm currently following"
Sure, I think a lot of those donations would amount to a few pennies or so at once, but I feel like a lot more people would be willing to support creators if they didn't have to constantly choose which to support.
$.01/user/month would be quite a bit here