Highly unlikely that this 'protest' will do anything. However I think it will be the point at which a lot of users quit Reddit. Thats the time where Lemmy will make get 20-50k new users.
I think there should be a website that compares the top 5 or so instances and explains the differences between them. Since right now, new users will have no idea which one to join.
Start referring your friends. If you have any.
I can say with 199% certainty that 2024 will be the year of the Linux Desktop.