Did you get any bonus for every referral you get? I don't know if any casino has such offers or not, but if you are supposed to get a referral for every sign-up, that's abuse though I think no such offer existed. Can you explain more what partial benefit you were getting for every sign-up? That would describe what's the exact problem is.
When they see you are sucking up their profit they limit you. That's the game for gambling sites.
Not sure if that's the case here really, it's a one-sided story so far. You must hear what BC Game has to say here. I don't think they would simply ban someone for no reason. I know at least one addicted gambler who used to enjoy bc game and have few good referrals too there.