I am guessing they are talking about strategies like Arbitrage Betting, Value Betting or something similar to these kind of strategies. anyway, it would be nice if they could actually list what they consider "recognised betting techniques" so gamblers can avoid doing it in their casino.
It can only be arbitrage betting that gets people's account banned nothing else, and the fact that they mentioned parent company means they could have information of this nature on other platforms which could register this gaming technique!
And btw, arbitrage is a formula so of the numbers do fit in well as in picture perfect, certainly they will not hesitate to flag one's account.
So out of curiosity, what happens to the players funds(deposit) here