One of the beauties of a niche site like Newegg is that they actually understand which products are interchangeable or related.
If I search for USB splitter by price on Amazon, I'm going to get flash drive cases, then USB cables, then flash drives, then I'll get into splitters. Newegg knows I didn't mean that, and that "products like this" shouldn't include everything with a USB connector on one end.
That's a great point, I never thought of searching for accessories on Newegg... even if I end up buying elsewhere, their accessory/peripheral search has always been one of the best on the internet for a long time.
I only noticed it when I tried Amazon and got slammed with a hundred pages of "it has a similar name!" matches. You can buy a laptop there fine, but peripherals and internals just aren't arranged in any coherent way.
I'm not sure what Newegg is doing (apart from specializing), but it works damn well.
Edit: But yes, their anti-patent troll activities are something I appreciate.