I am certain that at least some of these "losses" are manipulated ones, either from end users or from the drop catchers themselves. If GD doesn't close this loophole fast, then it will be abused into oblivion.
I have said this before, but GoDaddy's primary business is as a registrar, so their system is designed to treat a $10 hosting package using the same basic business process as a $31,000 auction win, and that's absolutely wrong. These extended 30-day payment schedules and laissez faire attitudes towards buyers actually paying need to end, now.
This is not a $10 domain, it's a $31,000 digital property and this type of transaction requires far more skill and attention than chasing someone for a $5 hosting bill.
Split the business units apart between registration/hosting and domain auctions, then create a totally new and far more relevant set of business processes for domain auctions, then assign the appropriate staff, time, and effort to these tasks. No way in hell a $31K sale should get away without selling it to someone down the chain.