A couple of points.
First, those restrictions have recently been kicked up a notch in ridiculousness. Some publishers now disallow gift copies in those "cheaper" regions - presumably, to stop such cross-region trading, but you can't even gift the game to someone within the region.
Second, it's important to remember that region restrictions are entirely up to the publisher. As far as I can tell, Steam more or less mandates cheaper prices for Russian region, but adding restrictions is entirely publisher's decision. For instance, no digital copy of a Valve game was ever subject to those restrictions (retail is another matter though). Most indies don't opt for regional versions.