Based on my current information and understanding, if you were here at 6am and attempted to join there should be history of that transaction in our database. At that time people were getting denied at checkout, but there doesn't seem to be any rhyme or reason why specific transactions got through and some didn't.
Right now we are working making an ordered list of all the users based on the time they attempted to join and were denied. If it turns out all the duplicates are removed and we have left over units we will try to honor the order in which people attempted to join.
I don't have enough information to say any of that is for sure right now, but I will be sure to update everyone as soon as I can.
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It's looking pretty good that the history of people attempting to join is in our system. Right now everyone is working on figuring out how to process the people who got denied at checkout. I'm hoping I'll get some more concrete details here soon.