Well, the rep said it wasn't about winning, but HOW the win was made. It just seems that increasing the stake when winning, and lowering it when losing, is what CWC consider as "abusive playing strategy", and a pretty SERIOUS one at that, since I was merely given a bonus ban, yet the OP had their account closed altogether.
It was clearly far more serious than MY strategy.
Yes, the terms HAVE been updated, and a number of weaknesses have been addressed. I can only presume that the OP inadvertently stumbled on a new weakness, CWC considered that this was used knowingly to exploit the account, and could NOT be dealt with merely by a bonus ban.
CWC are certain the OP knows damn well what they did, but as a new exploit, it isn't covered in the terms and conditions - hence, the OP didn't break any terms, BUT they took advantage of a weakness in the system that CWC considered gave them an unfair advantage over the casino that meant the casino could never make a proft from them over the long term, even if they played without bonuses.
Clearly, they do NOT want to mention what this weakness is until they have found a way to plug it, either through a software update, or a change in the terms.
It would not be the FIRST time this has happened either. It happened in 2006 on Microgaming software, and publicly the casinos were quoting "illegitimate play" and confiscating winnings left, right, and centre. No terms were broken, and players who complained got a decision in their favour. The casinos refused to tell even Max or Bryan what had REALLY been going on, and in the end paid players who had discovered the weakness, but not actually broken any of the rules.
I was intrieged, and started investigating what could have been going on. I got a couple of anonymous tip-offs, and eventually discovered what had REALLY happened. I later told Max about it, and he confirmed that he was never given this information when the cases were being dealt with, even though it could have saved the casinos from having to pay out because of "malfunction voids play" rules. This particular weakness actually worked BETTER if players didn't take a bonus.
The "mad hatter" Casinojack told me in London that there were similar weaknesses in two of the Real Series slots with RTG, and that some casinos had found this out, and didn't feature the games.
The RTG classic slot "Frozen Assets" was pulled RTG wide because it too had a neat little exploit within it, along with a number of other classic slots like Diamond Mine that had a weaker variant of the "Frozen Assets exploit".
RTG have always maintained that the games were discontinued because they were "unpopular", but it was not the PLAYERS who considered them unpopular, it was the CASINOS - many players LOVED them
To the OP - you have clearly stumbled on some kind of strategy that makes you unpopular with the casinos, but you don't seem to realise what you have found, and you just think you have been very lucky.
Have you been particularly lucky on certain slot games, and then carried on going back to them using the same strategy because you now feel this is the best way to play them?