Polymarket Head of Growth @williamlegate confirmed Contributor Rewards.

TL;DR from the screenshots:

> Link your X account to your Polymarket profile
> Put your Polymarket profile link in your X bio
> Post quality content consistently
> Share your trades, wins, and analysis on X
> Avoid slop, fake claims, and misleading narratives

Polymarket is basically walking us straight toward Rewards. You just have to follow the guide.