I used to use Skyauction for travel. In 2005, I took a cruise which, at the last minute my husband could not go on.
They jumped through hoops to change the other traveler's name to my girlfriend. In 2009, I purchased 4 dinner certificates to one restaurant in Pittsburgh that did NOT indicate that they couldn't be used at the same time. When the bill came, we had to fork over $120 for the balance of the meal and were told our certificates were no good. What are you going to do?
We paid. I don't use them at all anymore.