actually the price is even worst on polo... people are obliged to sell to pay Wolf0

Do you mean he sells his "private" miner to others?
The miner was commissioned, so yes.
Also, I don't work on percentage, usually - I get paid upfront or on delivery; so they'd be selling to get their investment back, not to pay me. I've been paid.
oh this explains the recent dump, there was a wall of 6 btc on polo, isn't there anymore