Well might be another probability
If more people online, the probabiliy is splited to all people online, so lesser probability to win something ...
I have collected with 210 booty keys yesterday from 17:21 to 19:40 GMT+2 only 1 part of ZEUS, 2 LF-4, no designs, a lot of APIS parts wich I already have them.
Ok.. then I collected from 02:00 AM GMT+2 200 booty keys. (lesser online, more probability for me)
I get 9 parts of ZEUS, 1 LF-4 and no design..
Cheers