Investors want to make more money as possible as much. Pre-sales are an important part of the token sales and there is a good intention to hold the main idea of ICOs.
becoming an investor, indeed what they really want to get is an advantage. because for them the benefits are very important, the problem is that they are not a small investment but also quite a lot so their desires must benefit. although sometimes being an investor there is also a loss, which is certainly reasonable.