I had them freeze my account because I was selling too much. They thought it was fraudulent. I was at the Olympics and selling a TON of pins. I could take in money, but I could not transfer it or deposit it in my bank. I could not even use my Ebay card to pay for postage. They required me to mail off a number of items for variety of buyers with Tracking so they could check that I shipped the stuff. Hard to do while I was in Canada. The money built up and remained frozen until my return and I was able to ship the items they wanted me to ship.
I can understand because I usually do 5 to 50 auctions a week, and I did 1000 auctions a week while in Vancouver.