I actually thought about that possibility at one point and took it seriously. But on the same token, steriod use is quite common here in the states regardless of stricter enforcement. So if they wanted to they could have just continued.
But I guess we would never know for sure.
Right, but there's a difference between NO repercussions at all and SOME repercussions.
At least in the US some guys do get caught, and repeat offenders do endanger their careers. Marquardt and Barnett for example. And many others do get caught, maligned and suspended for their first time ex: Sherk, Sylvia, Sonnen, Leben, Irvin and so on.
Is it fool proof? No, for that they need random-date testing instead of the fixed pre and post fight testing they have now, and even that isn't fool proof.
But it's a whole lot tougher than Japan. Name ONE guy in Japanese MMA that got caught or punished for roids. Don't hurt your brain too much, it's a trick question.
Cycling steroids may help you beat tests, but it's not fool proof. The human body is a tricky thing, sometimes it can throw you a curve ball and take longer to flush out, get you caught, and ruin your reputation for life. Which is why I suspect these guys went cold turkey when they came over.
But yeah, no way to know for sure.