There was a link to a calculator that offered what donut strategy to use based on the current bonus levels, etc. and it suggested that if my first 'bonut' box was 2, stop there instead of buying another for a total of 3.
I'm KEM'ing 40 KEMs at a time, so I'm getting 2 or 3 bonut boxes per round. It's slow going, but they don't call it 'grinding' for nothing.
I'm hovering at 4 mil IGC and as long as that number doesn't drop I'm satisfied.
Someone mentioned Black Friday in November and I got all stary eyed at the thought of raining donuts. lol
It would be a nice boost.