Week-to-week gains: Game of Thrones and Veep.
Week-to-week losses: (none).
Below are the HBO TV show ratings averages as of Sunday, April 28, 2013; the end of week 31 of the 2012-13 season. Ratings are typically the best way to tell if a show will be cancelled or renewed though pay channels take other factors into consideration.
Because there are fewer HBO shows and they don’t adhere to the traditional season, for comparison I’ve also included the most recent seasons of shows that aren’t currently airing.