Financially supporting the Fediverse

As some of you may or may not know, Lemmy, Mastodon, and Pixelfed are all part of the fediverse and are run by individuals who spend their own money to pay for servers. Every time a large wave of users arrives, they have to upgrade their servers, making it more expensive. Can we discuss and share some ideas on how we can financially support these individuals? Perhaps through donations at sign-up?

We have to be mindful that we have to support this with something because they are not big corporations just regular people giving out to the community.