For Casino I would try to avoid to CPA at all costs, with good traffic your expected earnings level tends to be much higher than any CPA you will get. + gone are the crazy days of $1000 CPA offers we used to get and so on :wink-wink
For poker, well, its also a matter of room stability and future legislation, but if you can get your hands on good CPA you can make some pretty damm good $$
:happydanc