If I steal $100000 from you, and you decide you value your relationship with me more than you value that $100000? Yep, you can just decide to let me have it and let it slide.

Believe it or not, deciding that you weren't wronged and not suing isn't a crime. It happens all the time. What people do with each other is up to them.

Did Bob allow his friend Jack to borrow his truck? No. Does Bob want to sue Jack for taking his truck anyway, and driving it into a ditch? No. Does Jack owe Bob big time for the mess he caused? Yes, but not in any formal legally binding way.

This works for corporations too. When two corporations find themselves at odds, threat of legal action is often used by one company against another as a leverage to resolve things behind closed doors instead. In a more amicable fashion - with no legal expenses of a protracted court battle and no loss of reputation on either side.