I bought some Electroneum (ETN) during the ICO and I'm yet to make use of it, since that wallet is yet to go live and Electroneum team keep talking about security and hacker one and other stuffs. They do try to keep in touch once in a while, so the answer to your question if it's a scam? Well, I can't say yes or no since there's still some slight chance of investors having their coins but what I would say is they have lost the momentum they gathered during the ICO and would need to do more, if ever they do not runaway with people's money, to bring back that momentum.