Some times I think if the developers own a lot of the coin, they will have more incentive to make it successful.
It's only a short-term incentive. The real talent is always going to flow towards projects that aren't giant scams (Bitcoin for example) which means you can only ride the wave and pump the price for a few years before the house of cards collapses around you. Good scammers recognise this and move on to the next scam quickly enough.