Answer: Subscription fees
Explanation:
The subscription fees is one of the type of agreement between the customer and and the company in which the user are purchasing the various types of securities for the business purpose such as stock.
The subscriber fee is charge to the user or customer by the subscriber for using the services.
According to the given question, the subscription fee is one of the primary revenue model that is typically used for the peter's new online business and peter is basically using creating the E-business tool which is used in the form of search engine in the industry.
Therefore, Subscription fees is the correct answer.