The minecraft integration is on their own server. They are launching their own server for users to play and mine. You are correct, there is no merger with Microsoft or the actual game. Now, they are part of Citi bank's "Tech for Integrity" Challenge Day in Singapore. This should yield some growth depending on if we ever hear anything about it afterward. You can read more about these two things from another Steemer's post: https://steemit.com/crypto-news/@squatee/the-digibyte-citi-group-connection-confirmed

I hold a good amount of Digibyte and I bought in early on (a few weeks ago) when it was around .00000300. I feel it is only going to gain more and more momentum. I am in it for the long haul. Now, depending upon what your needs or strategies are, would determine my opinion on whether I think you should hold or sell.