Until there is some sort of equivalent to dice's "provably fair" for these games then they should be treated as scams just like "conventional" Ponzis.
I am planning to open a ponzi(the gambling one not the lying) site myself the rules will be different and it doesn't really look like a ponzi(expect that the early ones get a bit of advantage).I am not sure how to make it provably fair I can for sure list transaction hashes(ingoing and outgoing) the game would be in rounds.What I mean by that is that there will be a feature to choose from one out of many rounds(1 hour 2 hour 10 hour ETC.) and the payouts will be manual for the first few days because I will make a 2-3 msig address (one is mine and the reaming ones are escrow ones) and maybe after time I will be making payouts from my own pocket(but you will still pay to an address that escrow's control).Maybe like opening the round and not letting any transactions in(if they still send it,that it would be returned) for few mins would help(to prove that the owner cannot take any advantage and everyone has the same chance of being first). Any other ideas?