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?
I can imagine what will happen here ... everyone will pile in the second the round opens and after that nobody will put in any more money for the rest of the round.
The operator can easily write some doo dad (technical term) to ensure that the bulk of the early money is his. How do you stop that?