1. I would like to disable backlink discovery on certain profiles, how can I do that?
2. There are no new backlinks being reported / I couldn't add new backlinks. What happened?
It is most likely because you have reached your backlinks limit. You can confirm this by going to your Plans page by clicking "Upgrade" at the top navigation menu, and see the "Account usage" section.
You can read further below on how to work around your backlinks limit.
3. I reached my backlinks limit. Is there any way I can reduce the count of my backlinks?