Just one to add to the tips already given and that is check out the telegram group. First if there is no telegram group, then it is a no go for sure. Second if there is a telegram group, check the size because often times that indicates how many people will spend on the ICO. There could be some bots present, but there is nothing you can do at that point.
Sorry but telegram followers/participants is something fictitious
Many ICOs if not all of them are "paying" in many ways for having the telegram group increased in number
Check something yourself, in a "big" number telegram group join and check how many people are writing continuously and simultaneously excluding the admins
Good counterpoint, probably a fairly easy thing to fudge. In saying that, and I hope you just take this as an open discussion, but I noticed your signature contains ICO info with a listed telegram. What are your thoughts regarding any 'proof of merit' in Twitter (also listed in your sig). Thanks again for the counter argument