You could make an argument for using that for, say, deciding on which products should be featured on a page that's promoting products to consumers. But for act

You could make an argument for using that for, say, deciding on which products should be featured on a page that's promoting products to consumers. But for actual product "scores" that people see that's a very bad idea. A book shouldn't have a 4/5 if everyone rated it a 5/5 just because it came out 50 years ago.