There are companies which are built around selling confidential information such as trade secrets, or information they have scraped from other sites. Some examples:
* 80legs.com, which scrapes data from Yelp
* clearbit.com, which has data on employees at companies, and is probably scraping Yelp and LinkedIn
* pitchbook.com, which allegedly has insider information on VC deals and sounds like CrunchBase but with information you'll never find publicly
* esharesinc.com, which seems to provide insider information on capitalization tables and secondary offerings (maybe it's opt-in)
How do these companies manage to succeed despite what I presume must be a giant legal threat?