most important thing is to not have money on a site that's small enough or doesn't have enough financial backing for it to be at any risk whatsoever of going bankrupt. far too frequently, small euro sites go bankrupt and your BR disappears over night.

other than that, i don't see why you would ever play at a site that doesn't have good rakeback for micro players and where 2nl is tougher than 4nl at your current site. any defense of it would seem to have to include the statement "i don't like money"