aside from it being a lot of work, my other thought was that people might not like someone else dictating what counts as significant to their character or cr, especially if theyre canonblind or havent followed every thread. its a valid criticism tbh but i think most people would be chill about it if the levels dont have much meaning

overall yeah just set a goal and let people do their thing. if you dont want people to hit 10 in a month then set a monthly cap on how much xp you can get/how many levels you can get, maybe have a shop or something where people can exchange prizes and have one of them be "exceed max cap for this month" or something so if someone REALLY wants it, there you go

roulette system for prizes could be fun too but its a lot of work