I'm running a long-standing PPR league that looks like it's going to be a few owners short.
In addition to the entry fees there are $3 transactions fees for add/drops. These get added to the prize pool. Only thing that is taken out of the prize pool is the MFL site fee (~$90), everything else is paid out.
Link to last years league site so you can see rules, etc.
http://www80.myfantasyleague.com/2016/home/15601#0
If interested please PM or post in thread.