D'Amelio has over 80 million followers and Rae is close behind with 58 million. People like D'Amelio and Addison Rae have blown up as a result of making and recreating Tik-Tok dances. However, it's all just for the fun of it until content gets a significant amount of likes and views.
As can be seen from reading this article and even skimming your own For You Page, Tik-Tok allows its users to create as much as they please and whatever they please.