I think it will get worse.
1. Gamblers are becoming better educated everyday. You could know squat about betting and piggyback Patrick's NBA, Raider's NFL, or SeaUrch's PGA plays and make nice bank. Heck, you could fade Pinny's "value" & make nice bank.
2. The US Govt continues to pressure & bully the industry. This scares off players.
3. Bonuses, bonuses, bonuses - in a saturated market shops need to offer these big bonuses that ultimately bring them down.
Books need to pray for :
1. Plenty of big upsets on high-profile games
2. More Beantown Jims
3. More EASY payment options (NETeller competition minus the unPATRIOTic ACT)