I had a similar idea. Here's some bullet points I jotted down a while back:

The value 4 value client

1. Every event/action should cost something, minimum of 1 sat.
2. Costs to post, like, boost, quote, reply, add relays
3. Could charge sats to See More on a note (first part would be like a sample or preview).
4. You receives stats every time your post is boosted or liked.
5. Zaps are split with the person who made the post, the developers, the client you're using, and relay operators.