I think platforms that adopt this would lose trust. It would have to be ubiquitous.
Discussion
Why? Users would be getting paid to browse their feed.
OK, let's take that a bit further. Why even have it look like it came from someone else? Why not paid fraud (impersonation) using cold hard sats?
We are talking about sending a message right? Fuck it. Go all the way with it.
It does not cause impersonated accounts, that is a separate issue. Also, spending a bunch of sats to fake a user is probably a poor investment since the fake user is going to get muted out of peoples' web of trusts.
I doubt that it must lead to a poor investment. I would obviously consent to the speech.
Something better than nip05 is needed to prove authenticity. Maybe it's web of trust. But point is if you pay to fake a user, and then you get muted, all you achieved was to provide some free promotion for the real user.
Want to do an experiment? Say I want you to make a post that defames Ross Albricht. It is a logically sound argument, but you normally wouldn't say such a thing yourself due to whatever bias you have.
To fill the gap of the bias, a negotiation or offer is made to 'get the word out'. Well, now I am incentives to accept the offer. It sounds rational on its face, and I could use the money.