Owner keeps the right to cancel the auction at any time and keep the coin.
How about you go somewhere else and waste other people's time? 
Plenty of way more trusted users do this. Why is it a problem when a new user does it
Show me one, please?
It will probably take me an hour to find it but I am going to start looking now
https://bitcointalk.org/index.php?topic=5068066.0
Same thing but worded differently. Can refuse any bid for any reason.
Also the last one that was worded like the OP was a high value item I think maybe a 5 btc cas or those sussie AG
Refusing a bid(your reference) and completely disregarding every single bid and making the coin/item no longer available(the wording in OP) is not the "same thing but worded differently"