And, since you're new here: Mastodon doesn't run ads, we do not sell your data to survive.
However the project has a patreon, and liberapay (and there's bitcoin and paypal info under the Patreon!)
https://www.patreon.com/mastodon
https://liberapay.com/Mastodon/
If you can afford a little bit every month, feel free to chip in! But if you can't that's okay too. $1 goes a long way!
Also check your local server for info about their #patreon to keep the servers spinning!