You can be a victim of too much exposure
There are more things that will keep you from getting signed than there are that can help. Appearing in unseemly places. Having the wrong type of pictures show up when you get Googled. Even having signed too many model releases!
Except in rare cases, commercial modeling agencies do not want recognizable faces. And fashion model agencies want to mold you. The only thing lots of online exposure may help you is if you are a promotional or amateur model doing mostly insignificant work.