Yeah pretty reasonable approach but either way wouldn't accomplish anything noteworthy, 20% hasn't brought anyone in purely because there's been no push to do that. There's a kind of paltry, wannabe series of marketing attempts by individuals but nobody seems to actually know what they're trying to market and to whom:

Free speech? Decentralization? high APR? DPOS? democracy? Get Paid 2 Blog? Reddit? Web 3.0? Entrepreneurialism? Play-to-earn? All of the above? It's so scattered.

In that environment, you could set it at 150% APR and at best a small handful of crypto bros from other chains will notice a whiff in the wind either as a scam or opportunity.

Hive: Bee yourself (lol).
Free Speech that pays.
Save n Speak: 20% APR on your words
Fuck the internet; make a real difference.
Global financial crisis? There's an app for that.

I dunno. Spitballing.

15-20% is a nice cherry on top. Below 10% and it doesn't even overcome current inflation rates so not even worth mentioning but can still function as a normal background feature.