There is something up with the Card Broker. I see some people, always the same ones, getting purple cards virtually every day. Today, one of them got two cards in a row. I don't know what the real odds of THAT happening are but I'm not sure I can count that high anyway
I ran stats on card drops for 8 weeks, just to see if I was imagining things. These people are getting 6-8 cards for every one that I get, steady.

I'm 3 weeks now with blue cards so I'm sure that purple one is coming soon