looks like you have a low paying niche. and getting PSA all the time means your niche don;t have too many advetisers for which google displays PSA when ads are not available
Saying in another thread yestertday that I only make $3 aday. Well today when I checked my forum: www.mkforum.org has made $5 in 8 clicks :O!
The niche is about our city, I placed the ads on their to see what I can make, and I can safely say I am $95 away from payout