To be fair, Amazon has 10 years of purchase history on my account, and they can't manage to put up anything on the home page that I'm interested in. Personally, I'm very much starting to doubt algorithmic recommendations for shopping sites. They work for books and music, but as Amazon has morphed into offering everything they can't recommend anything decent. I just get the same generic recommendations for products similar to my last few purchases, similar to Google advertising products that I've already searched for and bought. Adtech has promised a lot, but in my experience it hasn't delivered on most of those promises.

Oddly, I find the ebay homepage more useful, since it also displays a selection of products from sellers I watch, and has figured out I have a fetish for vintage test equipment. I don't think I've ever bought anything from the Amazon homepage, but I bought at least 3 items that I saw on the eBay homepage (from sellers I watched) in the last year. This relies on active participation from the user, however, and benefits people who have used the site for a long time. And I can't kid myself, eBay can't grow selling used test equipment and motorcycle parts, but they still do the online sale of unique items better than anyone else.

I do miss the 'rummage sale' aspect though, it's now nearly impossible to browse and find weird items, you have to just search for specific items rather than browse.