Not scam maybe have lower price after listing, team ICO re working for building coin price back to normal and higher than ICO price, they need time for building step by step with buy back and open working with other platform to make their coin become popular.
i disagree more of them is real scam project some times after ICO they dont want to list there token in exchnage ending up to be no worth at all. listed but in a low price thats still not good for investors, how come they boought it llower price at ICO then after listing the more lower than ICO price .