A question indeed that has to be answered before everything else. We can't criticize eg search engines for "previewing" content on search result pages and for s

A question indeed that has to be answered before everything else. We can't criticize eg search engines for "previewing" content on search result pages and for sending you to copycat sites with the most ads and ignore gross content copying at the same time. We also have these "helpful" insertions of links to archive.ph copies here when the original story is paywalled and sometimes even just ad-ridden - to copied content on archive.ph with third-party ads which I find at least unethical. That said, personally I do use Wayback machine about once a month for genuine search of historic content.