Chargebacks should not count in our cancellation rate. They are usually fraudulent. If a buyer is unhappy with what he got from a seller he can tell the seller and ask for a refund if there is a legitimate problem.
There was a chargeback on my account of $75 yesterday. I checked and this buyer had tried to buy a large quantity of expensive gigs at one time, and I told him to only get one when he told me he was going to do this.
It seems obvious this was planned from the beginning by him.