Ok, i got a big drop in my income as well, but never give up,
i went from $xx,xxxx a month to just a few thousands but i was prepared when i was making that money.
Besides improve my rankings with SEO for my casino e poker sites i started to look at other sources like cpa deals (non gaming), even adsense.
So, try to focus in the few affiliate programs that still are taking US players and give them your premium ad space.
Do SEO!!! After that MORE SEO!!!
One thing i never forgot when i came to this forum in 2004: Never put all eggs in one basket.
Thanks to Professor for that.
Take care