As I remember Uni 2 had D mode and it also lost a significant player base. It truly was like farmville as you can play by mines only. You were not able to harvest or attack while in D mode. D mode may have been fun for some but then not so fun for others. While in V mode you don't get any benefits so you wanted to come back out as quick as you could to be able to play the game. It is what it is when it comes to these games. The ones that are die hard will stick around, the ones that miss it will come back, but there will I am pretty sure not be anymore 10,000 or greater player bases that will stay around anymore.