Revenue sharing schemes are fairly common in areas where revenue from an individual's performance can be directly measured. For example, it's common for sales staff to have a low base salary + 10% of their sales as a bonus.

It's much more difficult to get right when you are building long-term assets (such as a website) instead of making one-off sales. If you build a website and leave, do you keep getting revenue share from it forever? If the company branches out to a new field, is that included?