"2. Fee. In exchange for the License Grant, WP Engine shall do one of the following:
(a) Pay Automattic a royalty fee equal to 8% of its Gross Revenue on a monthly basis, within fifteen days of the end of each month. "Gross Revenue" means all revenue generated by WP Engine from the sale of its services, calculated without deductions for taxes, refunds, or other costs. WP Engine will also provide Automattic a detailed monthly report of its Gross Revenue within fifteen days of the close of each calendar month, including a product line breakdown of all revenues generated. Automattic will have full audit rights.
(b) Commit 8% of its revenue in the form of salaries of WP Engine employees working on WordPress core features and functionality to be directed by WordPress.org. WP Engine will provide Automattic a detailed monthly report demonstrating its fulfillment of this commitment. WordPress.org and Automattic will have full audit rights, including access to employee records and time-tracking.
(c) Some combination of the above two options'