FranticFish - 8:27 am on Sep 17, 2010 (gmt 0)
You can have a peanut butter site and link to jelly, but it's more likely you will just add jelly section of your own
True, but perhaps your feelings on jelly are slightly different from a few other jelly-makers, and this is something that gets mentioned in the content you write for your site. Or you might be doing a roundup on jelly and peanut butter sandwiches and want to give some kudos to the people who first started making them.
I find that the more comprehensive an article / page I try to write, the MORE links I need to put in it.
I do this for my readers, but also for karma reasons. If I'm generous and link to others, hopefully people will link to me. And if I'm plugged into my networks and discussing what's new in peanut butter and the things it touches, I should be reading alot about jelly and other stuff too and should know a bunch of things I want to discuss and link too. Other webmasters in those related niches that do the same will probably be doing the same. People who come across my pages will hopefully think they are good sources of information and want to cite them as part of their own take on the niche.