The Exo dev is nothing at all like that Edgecoin scam. His updates are full of technical detail - Edge was just full of hot air. It is clear that these guys are the real deal and they want to see their coin succeed. Too much time and effort is being put into this for it to be a scam.
Its just a one man show until now. He needs to form a team to promote this coin
There are more devs but yes, he will need to get more people together for promotion.