I was on a flight with wireless internet.
I booted up, checked it out, and decided I didn’t want to spend the money for this flight.
But I might next time. By checking out their page, I gave them a huge hint that I’m a qualified prospect.
Too bad they didn’t ask for my email, or offer a coupon, or give me the opportunity to give them my name. The sales lead literally flew away.
Lesson: Getting permission to follow up is your first goal with any contact with a prospect.