Source? Most tech companies I've worked at here in the Bay Area have either a few contracted engineers in developing countries for a reduced rate, or contact with foreign firms that have very low rates. It's a global market, man.
13 karma · joined January 9, 2013
And of course, always ask for more than the above at the outset. It's a negotiation.
As for the value, the thinking is this is a public showing of one's affection, and real estate is limited / disappearing.
Hope that helps (at least with the social media angle).