If security really had been a consideration then Moscow would never have started using Windows in the first place. In the days of the KGB, when it said nyet to something you didn't touch it unless you wanted to find out what the inside of Kremlin cell looked like up close.
Seems that Moscow is not so concerned about security that using Microsoft products becomes an issue. I do acknowledge that all this cloud malarkey and constant online transaction has become a security issue and that is why Moscow is now drawing the line. The bit about cheating and loss of trust is just a jab for old time's sake.
If that is the case, then Microsoft can promise all the discounts it wants, Moscow will move to Linux and nothing will stop that.