Sainsburys Points Question?

Hi there I put a therory out to you all. I got a necter card today because i always do my shopping down Sainsburys on Thursdays, so therefor apart from earning when shopping, I was wondering if you can earn them any where online? Like the Sainsburys ToolBar for instance. So Im asking do you know any websites where you can earn points without buying things online? Can you earn them online as well, with out buying??? Serious answers only people...Thankyou.