quick question,

If I were to host my own bet server, and multiclient in the server with an alt
give my alt and I nudges for free, and charge everyone else with nudge prices,

that would be okay, right?

Technically yes, because its not an official server, but multicleinting is still wrong

You can multi-client in your own room all you want. It only becomes a problem when you are rigging bets or using it as an unfair advantage(To gain profit). Which doesn't really include playing twice in a row or giving yourself nudges. While that is indeed annoying, it's not illegal. If you are upset with the way a host runs his room then you can leave.