Ingress. I had a strategy that involves generating JARVIS viruses and AXA shields with my numerous MUFG capsules. Sadly, it is deemed too powerful and the production rates have been slowed to 1/10 or maybe 1/100 of the original rates. The strategy and buildup had taken a few months implement. Now, it is impossible. The hardwork had come to nought though I did enjoy several weeks of success.
This is where I quit the game for good. I was semi-retired anyway.