Perhaps it's because most people buy said laptop at apple.com and not amazon.com
Nailed it.
I wanted to ship it fast, so these are the reasons. Affiliate program is a nice addition to it, but even without it I'd still collect laptop mentions this way, as it's the simplest way for me to implement such a tool.
>More mentions does not equal better.
I totally agree with it, it's only one step in laptop research, but if you don't have time or knowledge to do some more research I think it's quiete safe guess.