I wonder if promoting your sites, is Prohibited by the Terms of Use? I've read the agreement and did not found anything about it.

My wondering is regarding the some kind of advertising for contributors.

Can you add your sites under your signature - so people will found your works on different sites easily?

and from other hand
Some users avoid to share their stock or any footage sites. As I've understood, only high level (top) sellers avoid to do that. Maybe not all, but when i am talk to anybody who making good profit on stock agencies they are very rarely gives the links to their pages.

Is it as they are afraid or somehow trying to avoid plagiarism from their works?
What are your thoughts on this?
How you promote yourself?
Do you do so even?

Regards