Few companies of any consequence are going to use a piece of software illegally.
Every boilerplate due diligence process when trying to sell your company includes looking at what open source work you’re using to see if there’s any legal issues.
You’d be stupid to risk scaring off a multi-million dollar pay day over something so trivial.
Don’t spend your time worrying about those who won’t pay. Almost always a better use of time to think about expanding those that do/will. It’s frustrating, but not a good use of time.
In a business context however, how knows how many apps are using it, and a properly done licence forces business to pay, maybe only once but it's something. A commercial license could bring in some small revenue that justifies maintenance and new features.
Every boilerplate due diligence process when trying to sell your company includes looking at what open source work you’re using to see if there’s any legal issues.
You’d be stupid to risk scaring off a multi-million dollar pay day over something so trivial.