I was unaware Damus was pinning zapvertising persistently on feeds.

Yeah that needs to die. And as someone who has used it (I'd like to think we'll and respectfully) I don't do so with the intention of clogging up the feed. To me it's an add on to a v4v transaction that both the zapper and the viewer should gain some value from. How clients implement these features will definitely have an impact on how zapvertizers behave. I see it quickly bifercating into mass small-sat zap spammers, and small businesses zapping targeted audiences amounts that compensate users appropriately.

I remain very bullish on the concept, but only time will tell!