@alixkun
You need to hire a top growth specialist! :)))
Joke aside (or is it?), the incentive is money. You'd have to pay them at first. If good content is the blood of the network and what will drive more organic adoption, you need some way to kickstart it. The challenge is to make it sustainable, because you can't keep paying them forever, so you need to transition them into more organic reward system, like $degen, $moxie or others community driven initiatives. That's where the selection of the content creator is crucial, because they have to have aligned values with the space, and somehow believe in the potential of a decentralized social.
As for up & coming content creators, I have no idea tbh. But that's another problem. You could start with already established ones.