When I come across hubs I truly enjoy I socially share them *sparingly* with my own comments about the hub and what makes it worth their time to read it. I think when we share too much it cheapens it - but when we share just the periodic real gem, it actually gets those hubbers more viewers.
There are some here who share anything and everything and while I appreciate their intentions, you can wear out a good thing and it ends up backfiring causing people to think oh another hub shared yawn... I tend to take seriously those hubbers who only share periodically because then I know the chances are good it's a real keeper. When it is then I share it further.