What's actually confusing in the analogy? Are you actually confused or just pretending? The point is that just because a sign says something under a literal reading, it doesn't mean that it's what was intended, or what's binding. If there's a piece of paper on my car saying "free to a good home", I probably didn't intend that you can take my car (or my house, or whatever). It's not very different to the fact that a 0-day exploit on your bank's web server does not entitle the thief to your money.
Your analogy is confusing, you’re comparing a free plant on the roadside to 63 million dollars on a crypto exploit?