1. The algorithm was designed specifically for @geyser , so that's why there is the condition of donation at the beginning.

The user is donating/replying *to someone*.

As you pointed out, if the user is posting, than there is no donation to someone else, so that can be replaced by a PoW msg.

So smth like:

- if post
    > PoW • c > t
- if reply
    > sats  > t

c is a conversion factor based on the hashrate and issuance of bitcoin.