I think it's an interesting thought experiment to decentralize ads without the need to spam feeds.
Discussion
Could see a use case where you have DMs from mutuals, and a separate DM section for accounts that want to pay for your attention. You set a sat-value of what your attention is worth and any DM that hits that gets through.
Or if you're sitting on the toilet and just wanna stack while shitting ya go look in the inbox of messages that didn't hit the threshold and sweep those sats. Shat-Sats