Definitely, some ICOs are not scam and I have seen and participated in some of them. I have now become choosy and a bit more wise now so to speak in involving in any projects. What you have said are right, you got to check the team, the product or platform and the project over all. Although there are projects that are these but end up as scam in the end, so it is a risky business after all. Just invest what you afford to lose.