After an update or 2 I still have the same issue. When I'm on 10/12 all you have left is collect a load of beer which takes ages unless you spend eggs or spend beer. That spend x beer needs to just be upgrade 1 card. All my cards cost 400, 500, 550 or 850. My mission is "spend 600 beer". Best case I do 2 400 upgrades and waste 200 beer. Edit. Really cheap change. Collect beer and spend beer missions. Completed collect and get collect cards. Spend beer removed so we can't use that to get cards