It's easy to avoid running afoul of the inducement standard. If an entrepreneur is sincerely not trying to profit from infringement, then she won't encourage her customers to infringe, and so plaintiffs won't be able to find evidence of her doing so.
In contrast, the court found clear evidence that isoHunt was trying to profit from infringement. For example, the 9th Circuit Court of Appeals wrote that for a time, "isoHunt prominently featured a list of 'Box Office Movies,' containing the 20 highest-grossing movies then playing in US theatres. When a user clicked on a listed title, she would be invited to 'upload [a] torrent' file for that movie." Since the top-grossing movies are almost always copyrighted, this feature shows clear evidence of infringing intent.

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