So, is the OP allowed to kick/ban anyone for any reason as they wish as long as that individual didn't have an active bet at the time? For say, they didn't like them, or maybe they bet a lot of TC and steal profit?

This hasn't been an issue for me yet, but I've seen this occur multiple times. I was just curious. I've reported an OP who canceled with active bets, and box told me it's allowed. So I don't even know anymore when it comes to that too.