I get that #Mastodon has some important problems to solve right now. But I don’t think blocking the entire M.S instance is an effective statement or form of protest.
A lot of those users took a chance on a new social network, which is hard enough to get most people to do. I wager many don’t know (and maybe aren’t interested in) these internal politics.
A block like that seriously screws them, and Masto still doesn’t have a proper, full account migration option.