I haven't really kept a running count. I thought there was a constant number of games in the instant collection.
They've generally tried to keep 12 games in the PS3 IGC, though there have been weeks where we've had more or less than 12.
Also, if anyone cares, since Christmas and New Years fall on Tuesdays this year, they will be publishing the updates on Mondays for those 2 weeks. Like someone said earlier in this thread, those updates are usually fairly light on content anyways.
Edited by tylerh1701, 11 December 2012 - 12:48 AM.