The better idea is that go to the places where the experts have left their rating on these ICO if they are in the favor of these ICO then they are good and will pay a better profit. Try to join them if you find any slot with them. But if the campaign is older and it already have completed most of its rounds then try to search for a new and fresh project bounty as from the older which have remaining only a few rounds you will get a smaller amount of bounty.