An email address is easy to track, as it asks you for all your personal information.
This can be incredibly lucrative because those followers have already pulled out their wallet for one content creator.
They need the information from the W9 form so that they can accurately send out the 1099 tax forms that tell everyone how much money they made.
Don't show face though, I don't think that is for you.
Before deciding to do otherwise, weigh the benefits and the drawbacks.
When you create content, you decide how explicit or erotic you want it to be.