Building placement, questions, and tips

I want to ask about bonus for blueprint from the helicopter..
it is said we will get extra blueprint if we place bizzies in speciality buildings. I did it. It was true, I got extra 2 blueprints in every helicopter. But recently, I only get 7 again as usual. 😐 Why? Where is my bonus?

I want to ask about bonus for blueprint from the helicopter..
it is said we will get extra blueprint if we place bizzies in speciality buildings. I did it. It was true, I got extra 2 blueprints in every helicopter. But recently, I only get 7 again as usual. 😐 Why? Where is my bonus?
 

Any chance you've reassigned the bizzie to another building and can reassign it back to the Central HQ ?

You should use the game mod on CoiMobile to get more. Should find the latest game mod of 2020 like the game I'm playing Street Racing 3D **** Mod. You can see https://coimobile.com/street-racing-3d-mod/