I'm an Amazonian (and you're all now imagining me in a leopardskin bikini, aren't you? 🤨).
Not exclusively, but primarily....for the prime delivery (which you can usually plan your day around), since I'm disabled and carless, and the vids.
Do you pay more? Sometimes, but prices change by the day, so you have to constantly virtual-windowshop.
That said, you can still get stuff much, much cheaper than with traditional shops (bearing in mind that, traditionally, there was a lot of price-rigging and protectionism, even on everyday items; being refused service for being the wrong type of person was commonplace).
Of course, lower prices and greater choice are mainly due to China, so eBay is also quite good if you're willing to put up with poor delivery services.