Newbie here. As I understand an ICO is based on a white paper proposal. And Mysterium done that and also demonstrated practically that it works. (Sorry for not using all the technical terms as I am not good at it- Newbie But I have been reading in the bitcoin forum enough to believe this could work. Many don't agree which I read as well.
 It must have been hard work and exhausting to get the project to this state. I am new to block chain and decentralisation but I do understand business. In my opinion the guys are taking a time out, recharging their batteries and thinking about the project. And yes I do believe that they take some of this money for themselves and have a good time. It is the reward for long hours to get it to this point. And also there will be decent wages I am sure of and holidays. Sounds all normal to me. I'd rather have a well rested and fed team  to tackle the next stage. They don't have financial worries to bring their project forward.
All this together could be ideal condition for success.
I think the principal of the decentralised VPN and rewarding the participants is a great idea . I bought a good chunk of Mysterium coin for double the price it is now and I will hang onto it and probably buy some more. And I don't understand why some people complain that there is no more announcements and updates. The ICO was the biggest thing for Mysterium so far. They have probably given all the announcements,plans, information there was. They have used all their arguments. What else could there be in such a short time? The ICO was a success. They have a plan. They have a good product(at least on paper). Once operational the coins will have value as VPN is not for free. Sure it could be a scam but what for when you could make more delivering the product. Of course I am new and there have been many scams I keep reading about. Actually there is hardly a coin which has not been accused of being a scam. Wrong or right doesn't matter it seems. Anyway high return is usually high risk , and not a licence to print money. I wish the Mysterium team good luck and have a great time enjoying yourself ....and just don't forget to come back.