Not sure what you are implying here - just because something is free doesn't mean you can use it in a commercial product....
If you post something to the public internet, you lose privacy ... that's how internet works.
For this we have robots.txt and authentication ... if a site allows you to browse their content, it's free to take, whatever the purpose.
- Indexing vs. Displaying: Search engines primarily index web pages to create a searchable database of information. They do not generally host or display full copyrighted content directly. Instead, search results usually provide brief snippets, page titles, and links that direct users to the original source. This approach aims to respect copyright by driving traffic to the copyright holders' websites.
- Fair Use Considerations: In some cases, search engines may display limited portions of copyrighted content under the fair use doctrine, which allows for the limited use of copyrighted material for purposes such as commentary, criticism, news reporting, or educational purposes. The application of fair use can be subjective and depends on the specific circumstances of each case.
Replace "search engine" with "LLMs", it's (practically) the same.