this is a sad fact of making a game that is profitable,
this is a sad fact of making a non profitable game
As many have mentioned above, I don't think it's for you to control.
If a player wishes to come and gamble spend their money as harsh as it may sound that's up to them, essentially there is a large group of RSPS players who only join servers to get rich quick/donate and gamble, in which case you're throwing that audience away to go to another server. where they will only go and do the same thing.
every game is profitable, even the most well known game like dota and lol they have betting for skins. let me rewrite your statement..
Dota, same game that sells tons of custom effects, upgrades, chest passes, and others? That is feeding an addiction for players to buy. LoL i do believe survives on skins, just like FortNite, which also feeds some type of addiction to collect. every game has a form of addiction behind its sales, whether it be skins to collect, or packages in a war game to get a small boost ahead of another, or monthly/weekly subscriptions.