Most developers for popular open source projects are already engaged with their audience. I don't feel that their level of engagement with their community is going to change based on my 1st hand experience with something like OpenCollective. Both of the projects that I've tipped haven't changed the way they communicate. It's the same whether or not you donated.
What you're describing isn't a problem at least for open source developers. There's no significant extra work for them if they want donations aside from posting a line of text and a link. Now with Github, it's even easier since it's baked in.
https://opencollective.com/nest
https://opencollective.com/date-fns
What you're describing isn't a problem at least for open source developers. There's no significant extra work for them if they want donations aside from posting a line of text and a link. Now with Github, it's even easier since it's baked in.