Businesses will receive a bonus when you hit certain milestones.

The first milestones are:

-25 Customers
-50 Customers
-100 Customers
With each Milestone you will earn:

-A speed or profit bonus for the business
You can also earn:

-A small amount of Candy
-A few cards
Once you hit a milestone you will see a profit multiplier apply to that Business, and the Candy or cards earned float from the Business.

 

The green meter behind your total Customers for a Business displays your progress to the next milestone.