Google, on the other hand, offers a free product. They managed to get their cut from the front-end, by having such a high-visibility site that companies would actually pay Google for viewership on it.
One of those sites is eBay.
EBay has one very irritating drawback, though. Not only will they allow their subscribers to use the site to trade in firearms, they now disallow most firearm accessories. Well, yes, it's their site. But they're screwing with what they originally had, which was very near to the dream of near-perfect capitalism. And since they've injected their own politics into the issue, I can feel free not to patronize their site.
But see here what happens when eBay and Google team up to respond in their own commercial fashion to my search regarding the caliber found in the Winchester Model 7:
(Click to enlarge.)
Yowza! ".351 Winchester For Less"?!? Really?
Seems like, if they won't let you trade in the item, they wouldn't claim that they do. This speaks poorly of eBay, and of Google's algorithms.