There are a few reasons why Russians like to visit Spain, being weather the first and foremost.
Did you know it can get to -25C in Moscow in the winter?
Also, Russian women love spanish guys. Mainly because there is a lack of men in Russia. They are still unbalanced since the last century wars that got most of the men killed.
Recently, the buy-a-house-and-get-a-residence-permit news got them even more interest in buying a house in spain.