@Edent oh yeah, I did not mean to say the spam necessarily originated from mastodon.social - only that I have heard they do relatively little to stop it. I am not speaking from experience as ever having been a denizen of that server.
But I will mention that it is almost trivially easy to move. When you create an account on a new server, the migration of all your follows and followers is largely automated. I have moved twice and painlessly. You can easily test the process with a throw-away account to see how it works if you ever want to consider it, of course.