That's not the important part of the announcement, and it's not the reason the stock tanked.

The important part is subscriber loss in other countries and the projection that over 2 million more subscribers will be lost over the next quarter. Compared to a previous estimate that the company would see a net increase in subscribers by 2.5 million last quarter, that's a big letdown and the market's reaction would have been the same even if the Russia numbers weren't bad.