It doesn't tend to work like that with high rollers. I witnessed similar competitions on other sites and you usually get people coming in just to try and get the top prize and then never coming back. This might be a little different as the top two are winning quite a bit from their gambling as well, so I wouldn't be surprised to see them both try again next month, but I don't think it will turn into a regular pattern.

I really can't imagine that we would ever punish someone for winning and bar them from next months competition.