Making comments and posts has no bearing on rewards. So bots who do that aren't any more likely to get reward sats than a user who never looks at SN.

The rewards pool exists to incentivize zapping (it is divided among users who are early to zap posts and comments that others also zap).

While SN has its fair share of bots commenting, I think they are mostly trying to trick people into zapping them. I don't think the rewards pool has much to do with that (it may have other flaws, though).

I mostly agree with you. But let's try to put a name to this thing then:

It is the case that onchain transactions in Bitcoin are mostly easy to track (let's say this is necessarily the case). If it wasn't that way, perhaps it would be much more difficult for a government to attempt to blacklist a specific person's coins.

What should we call this quality of onchain bitcoin?

Lightning doesn't have it anywhere near as clearly, and it might be useful to be able to talk about it.