it really make me realize. buy premium template keep my website free from back link. here is my opinion :
every time I use free template for my weblog there always credit link on footer. Sometime I want to remove it, but theme contributor always asking with gentle sentence to keep the link on my weblog. after view days I realize that live link on my weblog is give theme contributor qualify backlink and my weblog become link feed even when my weblog in high rating, web link in footer is higher rate than my weblog.