1. robots.txt is not a replacement for copyright law, it is a "protocol" used by most crawlers. 2. A pure Google Search company could show ads, by being a clie

1. robots.txt is not a replacement for copyright law, it is a "protocol" used by most crawlers. 2. A pure Google Search company could show ads, by being a client/distributor of ads from a (pure) Google Ads company. Just like how ads on your blog get you money.