KK are always winning and not get banned, he must have some secrets.
I just notice one secret from KK, he rarely play RTG, is that true,KK?
I think KK has suffered a few bonus bans, but he plays low stakes, and uses bankroll discipline, rather than "tricks" such as big bets followed by grinding. This ensures most of his play looks "legitimate", and only casinos that ban merely for being ahead are likely to ban him from bonuses.
I recall KK getting a Rival-wide bonus ban because of their central database, but as one of the few reputable affiliates still prepared to work to separate the jewels from the turds among the Rival casinos, I believe many Rival casinos overruled this at local management level.
I mostly play Microgaming, and have been bonus banned by quite a few groups, but where I am down overall, I have been made up to VIP, which tends to compensate.
If I stop getting the offers, and CS don't say anything, or try to pretend it's down to "spam filters, etc", I do what I have learned to do with small children.
If they behave badly to get attention, ignore it, and usually they will come back and apologise or try to renew the relationship.
I recently had this behaviour from Red Flush. They changed to a new loyalty scheme, sent me the VIP pack through the post saying I was more or less "VIP for life", yet cut me from ALL the weekend and weekly offers at a stroke. I thus ignored this undesirable behaviour, and as July started, I began to get the "we miss you" emails, along with some "exclusive" 20% and 25% offers - pretty much the same as they normally offer.
Too late for the recent tournament though, but with Slot Survivor 5 starting tomorrow, they may well see me return
This means that for the rest of you, don't bother

The 65 inch telly is mine, if not the holiday. (Unless the slots decide to be really MEAN to me, and I lose my nerve).