It depends on the arrangements you have made with other sync licensing companies. If you have an exclusive deal with another company, yes, it will interfere. If you have a non-exclusive deal with another sync company there shouldn’t be any problems.
However, the YouTube and Facebook Monetization portion of our Sync Licensing program IS EXCLUSIVE, so you need to make sure that you haven’t granted those particular rights to anyone else.
Need to know what is eligible? Check out this article.