I have a backlink to my business site in my IMDB profile and google webmaster tools has picked it up. the backlink is over a year old. when I check in majestic and ahref, that IMDB profile has basically NO trust flow. 1. even though IMDB itself has a high authority, would a page with zero authority hurt my ranking? 2. should I get rid of this backlink since IMDB has absolutely nothing to do with my business site? or should I try to get some trust built into it and have it gained some trust flow?