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Wut?

they use a trick. if a gift is CIS, you can't transform it.

M, they use that option that if gift is russian, he has no restriction to play other countries. FOR these is site steamdb.info where u can see it.
http://steamdb.info/sub/12100/
Here we see skyrim
ANd there ispoint that: onlyallowrunincountries: RU AM AZ BY EE GE KZ KG LV LT MD TJ TM UZ UA- countries where u can run RU version.

They can do a lot of profit trading non regional locked games but for someone this isn't enough. Buying using a bug not only make the trading less safe, but also you, as buyer from the store, can get a ban once Steam notices the security hole. Think to what happened with Southpark: this game was already regional locked but someone has used this security hole or a similar one to get ROW copies, later these copies were turned into RU/CIS version...

The exploit you are talking about is a violation of Steam Subscriber Agreement, and its details are not to be discussed on this forum for obvious reasons.

This transaction is risky cause it's easily traceable.
Even if the gift is RoW (denoted by the SubID), it's still tagged with the store it was bought from.
Actually you buy a game from RU/CIS store, even when the SubID of the game is NOT available on these stores.
You can check (the store the game was bought from) in the Steam console, after you activate the game.

isnt exploit. RU tag in the name doesnt mean its region locked game. only gifts with exclamation mark are region locked. for example skyrim RU got region lock but skyrim LE RU doesnt

I think I found some clues, will update the post if I find anything more solid.