When you do too many of the same mission in a day, your maximum earnings for the mission goes down. That's why the earnings from the band rehearsal came down drastically and I didn't realize until it was one too many and I read the post mission report.
I thought my ranking would have improved a little but it went backwards instead. Not sure why that is because I have been playing more. Maybe the competition has as well.
Cards wise, i am still working towards two more packs byt the end of the month. Three seems unlikely but two is doable. Of course, if I could resist, it makes a lot more sense to buy a 10 pack and get the extra 2 pack boost. That's six extra cards and a good way to increase the probability of getting an Epic.