What do you define as a Premium Lead?

I’ve read through Brian Grimes RE Jobber course and through the forums for quite awhile.

From the RE Jobber a Premium Lead is basically one that you’ve paid to get. Through List Services.
From REIClub.com forums I understand some of you want your Birddogs to pretty much do everything but close the deal.

So here are my questions:
What takes a lead from basic to premium?
What takes a lead from premium to the kind of birddogging Hassnar uses with %'s of sales price?

My ‘basic’ lead includes the following:
House address, tax assessed value, asking price, owner contact info, 2-3 pictures, short description of the house.

-Troy