I got asked this by a few different journalists today, so I'm just going to share the numbers. 10,801 people signed up on different Mastodon servers today, and 22,139 since last week.
Update: 49,215 new users across different Mastodon servers since yesterday. Probably a lot of them are actually from yesterday. My crawler only runs once a day so I get a bit of a delayed view of things.
@Gargron how do you crawl?