I have withdrawn all my work from stock libraries. The business - at the moment - is working on a race to the bottom whereby each competitor appears to be cutting fees in an effort to maintain market share. The business model does not work in the creator's favour. Here's why:-
1 x image sale at $1000 = $1000
Terms are 50% so agency make $500 and photographer gets $500
Now consider the 'secure market share' option:-
100 x image sales at $10 = $1000
Same terms so agency makes $500 and the photographers get $5
There is no incentive whatsoever for an agency to maintain fees as long as volume sales rise...
The best agent is yourself. Sell direct and sell high. If you have stock of clownfish images then maybe its time to shoot something else...if you have something unique and in need then cut out the agency, pick the phone up and negotiate the best terms for yourself.