You can't say that an ICO is scam or not unless the project starts. ICO (Initial Coins Offering) is the first step of these companies who want to offer their product to people. During that time, they are trying to evaluate how people patronize their project/coin/offers. If there are a lot of people joining the ICO, then the tendency is that the project will be successful. On the other hand, some ICO don't succeed, thus, forcing the company to close after some time. But still, you need to take risk to become successful, too. No one gain without any risk. That's what cryptocurrency world is all about.