delaying the start of the fan will help if your at the "almost" instead of "barely" adequate stage. For many many AC starting issues with generators your often no where near the "almost" conditions, your at the "won't" condition.
The micro air easy start will work for those "won't" and "almost" cases. The posted solution may work for some of the "almost" conditions.
A time delay circuit for the fan start is less than $10 worth of parts. I suspect the profit on this solution is quite high. But if it works for you great.
I made one for less than $10 with a time delay relay and a resistor to set the time delay. Unforetunetly the time delay relay for this has been discontinued.