I was trying to 'farm' these tokens this week by both 1) capping the bonus requirement (the 10/20/20/+20) and 2) creating a ton of butter. But I stopped receiving tokens after the bonus requirements were completed.

Is the weekly 'max' only the 70 tokens from the shipping request? I was hoping I could get some spares by overproducing, but I may have just wasted a ton of rock salt...