I have not seen it used much in all my time looking at Spanish domains, which is a lot.
Really, it does not seem to be as popular in the U.S. as opposed to say seven years ago.
I've noticed a lot of "enlinea", meaning "online" domains dropping like crazy.... maybe b/c they are not "in" anymore.
It's kinda' like saying "cyberspace" now.... it sounds so 1996.