I have Noticed this, They should take a look at how the developers over at GGG (creators of a free to play game called "path of exile") deal with the community that plays their game, they are pretty awesome, probably the best i have ever seen and the game is free to play!
And yes they definitly decided to realease this Dayz SA alpha just to capitilize on the hype of the mod.
However I never played the mod and i'm having a great time playing this buggy as hell alpha so i'm not really complaining.