thats true I suppouse but they COULD have gone a better rout and said only 0.5% were going to make it in, in the first place.
They couldn't Tell you that only 0.5% of the people who entered would get in because they didn't know how many people were going to enter the beta. If less people entered, then obviously the percentage chance of you getting in would be higher, however, because such a high number of people entered, which they wouldn't know would happen, the chance of you getting in drastically decreased, as they wouldn't want to give too many people a free copy of Dawnguard, because after all Bethesda do need to make money from it

Sorry if this doesn't make sense, I'm typing it on my iPod and it is painful, lol.