I'm genuinely confused about the legality about building a business whose sole purpose is to scrape the web, repackage and sell that information.

One side of the fence, you have all this publicly accessible information, so it's like.. why not? Anyone can obtain it. Why should you be restricted?

Then on the other side you have companies who will place all sorts of legal restrictions, TOS/EULAs, etc to prevent against web scraping; sending out cease & desists and even sometimes going as far as taking someone to court.

What's the best + safest approach here for a company like Priceonomics?