Yes, Dom, we do know. This is a quote from FL response on the thread:
This is a case where players purchase the minium required to receive the offer (no problem with this) wager the full amount on one hand of a low risk game and, if they win, proceed to play only French Roulette, betting on red or black / odds or evens to meet the wagering requirements and then to cash in and disappear. This is nothing else than bonus abuse, call it what you like.
They can call it whatever they like, but it does not break the T&C.