i have only participated in this event a little bit.
however, i have watched the coin event chart and i have a big zero at the bottom. there have been 5 win, 3 win, and 1 and 2 game win days when my ship(s) matched the calendar. after first missing a 3 win day, i tried going to the chart to 'click on something' for my coin reward several times.
lol, nothing clicked and despite my appropriate wins, i still have 0 coins to spend. actually, i quit worrying about those coins and just played to meet my personal goals each time. in the past i would be bouncing floor to ceiling screaming for my reward, but i will simply say 'why bother to have an event if rewards are not being given out?' or possibly, 'i should not have to hunt a click button to get my rewards. this should be automatic in the programming.'
mostly, this coin thing is just really annoying.