Whoever owns 1CfsAiYaVfk12dnZpZALcRSP9jjWDk26FX - Your software is terribly broken and paying out massive transaction fees. Over 100 BTC in the last 24 hours as best I can estimate, and a lot of it is going to pools that pay transaction fees to miners meaning there isn't an option to just ask for the money to be sent back.
Wow. Hopefully this person sees this post. How on earth did you stumble on this?
I stumbled on it when someone in #btcguild told me the pool just hit a 106 BTC block. The pool is nearly all PPLNS which is immediately credited for blocks including txfees so it's not something I can just refund like the pool has done in the past (used to be 50% or less of the pool on PPLNS, now it's closer to 5%).