I started participating in dynadot auctions one week ago. I won 8 auctions and so far 4 of them are cancelled. Your terms of service say it is rare that auctions get cancelled. But it's not rare. It seems extremely common. Almost every auction I won was cancelled. What a waste of time and energy.
The Expired Auction gives our customers a chance at acquiring domains that would otherwise be deleted and possibly bought by someone else immediately upon becoming available again. Unfortunately, this also comes with the chance that the domain will be renewed by the current owner during the Expired Auction period.
We hope that this clears up any questions and/or concerns that you may have about this topic. If you need any additional clarification, please do not hesitate to reach out to our live chat and we would be happy to assist you.