1. 10 posts in gambling section may seem too much for people here as most campaigns asks up to 5 posts.
It seems pretty appropriate for a casino that wants to gain more recognition quickly, 10 minimum posts means twice as much recognition in the gambling boards. My own campaign seems to be doing alright so far with this requirement.
2. Your pay rates are decent but NOT enough for someone not to think about switching.
3. People may prefer long term campaigns. If you assure like this campaign will last for next 4 weeks or 10 weeks then people will show interest and persist.
These are things only the owner can decide on and they're entirely out of the control of the campaign manager.