I've been wanting the get the DLCs for about a year now, but I can just never justify. I have no interest at all in the DLC campaigns or missions, all I want them for is the textures for the units in multiplayer. Everytime I go to look at them I just can't get over the fact that I'm effectively looking at paying £15 for better textures on a couple of units you rarely see. So my suggestion would be, how about selling just the textures for a knockdown price? Like say £3 per DLC.
I'm not a DayZ player but I'm almost certain there are thousands of DayZ players out there who have absolutely no interest in the Private Military Company campaign and wouldn't consider buying it, but would quite happily fork out a few bucks for a higher res survivor skin. I think it would be quite a good earner for BIS.