There are a number of ways to build credit systems. Some models give back credits if the user reports an inaccurate contact or a piece of data. Other models, like ENGAGE, build this in the pricing and value of that piece. We have certain assumptions around accuracy and take those into account in valuing the price of that piece of the system.
Here is how that works:
Assume that your goal is 1000 good contacts
Assume accuracy is 80%
Credit model 1:
Credit model 2: