Nah surely not..how would that even work? This would mean you are adapting to the tastes of a shifting and growing crowd (supposing nostr grows into something much larger) for pay. Suppose that makes sense if you are trying to make a living or generating income from here through posting, but even then I'm not sure. 

 Actually not even a crowd. You could have a scenario... Let's say some big spender like Peter Thiel joined nostr lol, he could just manipulate posting themes with big zaps lol. That would be funny, but still.