Board Thread:General Discussion/@comment-26581304-20151009202229/@comment-7326455-20151009215645

Yeah, I teleport them when I can to free the space for another monster - figure I can replace it later anyway.

It does seem like monsters give more coins the higher they get - once my Tweedle crossed level 12 or so, it was suddenly offering 2000 coins a pop. That's only one data point, though. Haven't gotten anyone else that high yet.