Yes, I think it's a pretty big bonus for early investors. But on the other hand, the project team needs support and therefore they are looking for it in their investors. But unfortunately most of them buy coins just to make a profit.
Supprt will always be given by investors but the problem is if those developers are not so competence to develop the platform. offering big bonus in early phase of crowdsale just a kind to destroy their project as people will do an instant dump to the market. So many projects have died caused by this kind of promotion.