Regulated Social Media Content has the purpose to connect and entertain. Free/Decentralised and ICO based Social Media is serving different Gods.

Lot's of ppl do flee from the big platform since the Apocalypse, but they basically have been on the wrong platform from the beginning. Based on the purpose you will find them on different Sites. I can imagine that cat videos and Clip Compilations will underperform on D.Tube, while environmental, news and political talk could bloom beyond imagination. For Bloggers and classical genre-based Influencer is D.Tube a nice "One-Click" extra revenue.

It's better to think of it as a run for users, then as a battle between Platforms - cuz it isn't.