Testing purposes for hundreds of thousands of hands? Aside from that making no sense (though granted - you are hardly an ally of common sense), the basic terms of any of these sites is that you cannot play on multiple accounts.
There are a bunch of basic reasons these rules exist, but you have already shown that when you do not understand something or consider it important you simply ignore it and wonder what the problem is when you continue to violate the rules and get caught.
Nobody will genuinely believe you did a little test of 200,000+ hands (which would take weeks or months to play) on a buddy account to try to prove some weird, pointless riggie theory. If the two of you genuinely believed your account was a winning one and his was a losing one - then even in that LOLstupid scenario the two of you would at least agree to play on the winning account to prove the point, to at least make some money in the process, since one or both of you would be this guy
https://www.youtube.com/watch?v=sZHCVyllnck
Odds are you were botting multiple accounts. You also got warned not to use certain software. You continued to use that software. You multi accounted. You are incapable of believing you did anything wrong. Pretty simple in the end.
All the best.