What importance do you give to social accounts corresponding to your domain names. How a company will manage her marketing budget without owning the same username for the main social accounts. Do you have names which have all the main social account available or they are owned by you? Have you ever had a customer asking if you have the social accounts associated with that name or somebody ever wanted to buy a name just if it could have the associated accounts at facebook, twitter, instagram, pinterest, linkedin or other? Brandbucked is asking every time when you submit a name if you own any of the social accounts associated with the name, so it's possible that they think that it will be an important asset.