Following text within quotes was copied from [this](https://askubuntu.com/help/bounty) page

"If the bounty was started by the question owner, and the question owner accepts an answer posted during the bounty period, and the bounty expires without an explicit award then we assume the bounty owner liked the answer they accepted and award it the full bounty amount at the time of bounty expiration." 

What if the bounty was started by the question owner and did not accept any answer?