Hi,
a long time lurker here who just registered to say "Thanks, adonys".
I'm downloading from Steam right now.
BTW, when purchasing I discovered something that makes at least the purchasing process much less of a headache for non-russian speakers. Yuplay have their own in-store currency called "yum". These yums can be purchased on the english yuplay.com site and will be valid for yuplay.ru, as well.
I bought yums for USD14.50 using a german credit card that was never used with Yuplay before and I didn't have to go through the whole small charge/amount confirmation process, so no currency conversion hassles at all.
If anyone wants to try this, here's what I did:
Register with yuplay.com and buy 46.5 yums. Once you've got those, log into yuplay.ru using the same credentials; the yums you've bought on the international site will show up at the top. Find Cliffs of Dover's product page and put your mouse pointer on the button that says "Купить 395.08". A list of different currencies and payment options will pop up, the first one is "46.48 yum". Click that and you will get a popup - as far as I can tell this informs you that Steam is required. Tick the checkbox and press Ok. Another page will come up, press the button and presto - a Steam activation code will be in your mailbox.
Hope this helps!
Cheers,
apollo