Well, look at Trump. Trump was kicked from Twitter, so he made an alternative one (Truth Social). It seems to be running on Mastodon, which is what you suggest

Well, look at Trump. Trump was kicked from Twitter, so he made an alternative one (Truth Social). It seems to be running on Mastodon, which is what you suggested; and he made some custom app, which you suggested. Unfortunately, I cannot see Truth, as Truth is America-only, apparently. edit: Gab made an alternative Twitter, also based on Mastodon. You see... right-wingers _had_ to do alternative Twitters as they were kicked of the real one. They have an experience in this.