This is getting stranger all the time - after rereading Machiavelli I figure Microsoft might be hoping that the GPL3 pracktically shuts down the distros (not Suse) that signed agreements and generates a bad rep for OSS in general.
These are distros people paid for and can`t then get their goods anymore because of the bad boys from the FSS.
I can already see the ads:
When will the FSF shut down your IT departement??
Not with MS!
Other idea would be to help the poor customers out because - after all they bought software from MS partners and thus are practically family.
In any case the GPL would be tested in court or if they just let it go be reduced to a laughing stock.
Those MS guys ain`t stupid