I strongly believe that it isn't a scam. First of all the second their ICO ended they could have just gone silent and not said anything at all but their admins on the telegram group are still responding and telling people to be patient.

Secondly trades were actually taking place on the satoexchange site, although they hadn't launched the SATX based trades, their BTC, Dogecoin, LTC and ETH based trades have been going on for weeks.

I believe that what happened was a simple case of site overloading. Alot of people planned to trade in their SATX for some BTC or Ethereum or whatever today and the surge in the number of users must have overloaded their systems.

If you check the site now, you'll see that they're currently trying to migrate the site to a bigger and better server which will be able to accommodate the increased traffic on the site.