For the record, the numbers in my initial post were from Acacia's Content Provider License. A similar scenario for a webmaster goes like this... If you estimate that your annual earnings will be no more than $50,001-100,000 you'll pay a $3,000 annual royalty (ie 3-6% of your gross) IN ADVANCE. But if it turns out that your actual earnings for the year are $100,001 (ie just $1 over your estimate), Acacia will demand an additional $6,750, thus you'll be paying Acacia a total of $9,750 or 9.75% of your gross income! And Acacia says that they will be increasing their royalties from 1 December!
Here's a link to the full contract:
http://www.acaciatechnologies.com/pr...eAgreement.pdf