I don't think Populous will hit big exchanges immediately. There are only 1100 owners of it.. need some distribution first so maybe a few weeks to a month from now.
Number of investors has nothing to do with listing at exchanges. It is idea behind the project by itself which is important like how innovative and potential is there. Populous has both things so there should not be problem of seeing it at most desired exchange at the moment. I mean to say Bittrex would like to add this without any reservation.