That's the problem of most ICOs. They seem to be scams because they don't offer any prototype. Most of them look like a dream that needs money to be true. Really good projects offer prototype and clear roadmap and have to have some proofs of trust.
Always becareful. No working product ico seems like ico has no effort to make sure their customer get good feedback so its just like scam ico. Always stay away from this kind of ico. I will not suggest you to buy the ico token although you are very sure about the project.