If you used xHamster's tool to make an account on another site, the messages you send or receive can now be handed to that other site and displayed there, along with your username and details about the message. Messages you thought were private between you and one other person could end up visible on a website you never chose to post on, run by a company with its own rules. On an adult site, that kind of exposure can be especially damaging.
“personal messages sent or received through your account, together with the associated usernames and message details, may be displayed on the third-party platform(s) and viewed there”
What you can do — Check your account settings for any accounts you created on partner sites through xHamster and unlink or delete the ones you do not use. Until you know exactly which sites are connected, treat anything you send in messages as something that could be shown publicly, and avoid sending photos, real names, or contact details.