Maybe Gold League is simply not chosen much? If you look at the rewards, I'm usually seeing bronze at 0, silver at like 40-50, gold at about 140-150 and platinum at around 210-220. I'm guessing that people play mostly bronze (for rares) and platinum (for score/electrum) and aren't playing silver/gold as much. I should get into platinum league tonight, and if there are less than 500 players in platinum, then maybe I'll get more plays. My brother is also in gold league and he has 6 plays in two days, so at least based on our two accounts, I think people aren't playing against gold league opponents as often as others.