This really needs to be higher.
Running a Mastodon or Lemmy server is surprisingly cheap. With some specific tweaks and rules (esp. hosting images and video elsewhere), it can get even cheaper.
If your only goal is to break even, then it’s amazingly easy. Roughly 1 of every 20 users contributing $1/month. Adjust the numbers as you see fit.
Or a single, non-datamined ad at the top of the page.
The numbers are highly skewed because of the launch. A number of users are being paid to create content during the launch. A lot of the users are just checking out the hype. Some will stay, many won’t.
The numbers won’t really be useful or comparable until the dust settles. I give it a month.