Lemmy/fediverse is too small for big creators now, which is why celebrities are still on Twitter and not on Mastadon. At the end of the day it's still a business descision.

That being said... Unlike Twitter, on Lemmy, the content is the links to content created by creators regardless of where they post it. I think we will see Lemmy rise much more quickly than Mastadon. But it'll rise for sure for the same reason Reddit became what it is originally.

So maybe give it some time?