This one wasn't based on the eggs mod. I was able to change business limits using the GameplayDefault OC file.

What file did you change to set the new limit? Is this based on the eggs mod?

They should do. I find the biggest impact is normally observable in the larger maps like Paris or Hamburg Lübeck and Kiel. The speed with which Dynasties build new businesses is also affected by the difficulty level you choose to play. For example, the AI tends to build more businesses faster in Impossible mode then in Easy mode.

Do you know if the AI dynasties make use of the extra business slots?