Yes, I was in a signature campaign in Enigma Catalyst and it was said there that we will be paid with tokens but still we haven't received any token from them. It was about 18 dollars worth of tokens per week. We, the participants, waited for about a month for the releasing of payments but it was just some sort of scam.

I guess you can never pick an ICO. You can never be sure if it is a scam or not, so basically what we can only do is to report them in order to prevent another scam from them. It's okay if the ICO fails and the payment is not made, If payment is not made and the ICO succeed well it is a scam. We just have to trust on our initial conviction or judgement of the ICO then luck is all we can hold onto if the ICO will be a scam or not.