Kristian: How big was the increase of the number of regionally priced games from yesterday to today?
According to my two regional pricing lists, 131 regional priced/discounted titles before, 928 after. So almost 800 additions.
Kristian: Did any games get new regional prices anywhere else than in Russia?
The Ukraine and a block of ex-Soviet countries, which are the usual ones that get the Russian Discount.
Kristian: Did prices increase anywhere outside of Russia?
Apart from the above countries, not to my knowledge. I'm not checking 800 titles by hand, though.
Kristian: Why is the fair price package allegedly just for show if people are actually getting it?
It's only fair if you pay more than the US price. And technically not even then, since you still pay more, you just get a credit in return.