Yes and no. I agree with you there's no way they'll refuse to take millions of dollars users basically just hand to them for nothing in return. More likely though they will do what they've announced in the past and have been planning for ages. The "gold" will become onchain tokens which users can trade and sell. So the rewards would have actual monetary value. Basically it introduces a financial incentive to be online, for even more addiction potential.

This would be my guess because that's what they said they would do in the past and they've already run trial versions in selected subreddits for a long time.