lol, but seriously, this game is moving forward, TD has been advertising CSGO stuff for how long now, and bringing in an older version at the same time would complicate things.
the whole "if you build it they will come" theory does not work out well for gaming servers
to have a 1.6 server we need a solid 1.6 in-house gamer base, not 1 or 2 guys who occasionally play 1.6, but 15-20 hardcore faggots who are still wearing fruit of the loom briefs their mom got them for christmas back in 1992.
in fact, GO will only work if at least half of our population transfers over, if not all of it, and then source will die... hopefully.