A New Advertising Technique?

Someone stopped me in the street the other day, asking for directions to Ponsonby Road.  I pointed out the general direction, showed him the way on my smartphone, and he thanked me.  So far so good.

"Oh, by the way", he then said, "I have a restaurant - have you heard of <insert restaurant name>?"
"Umm", I replied, humouring him, "well, I know there's one in Mission Bay."
He pulled out a little card, labelled "VIP card", with a 25% discount offer printed on the back, and proceeded to write my name and the date on it, then signed it.  Well, that's nice, I thought.  What a clever way of making me take his advertising, which I never would have done otherwise.

Then it got a bit weird.  "Can I have your number for our restaurant records?", he asked.  Not wanting to risk offence, I gave it to him, though I secretly thought it was intruding on my privacy.  Perhaps I shouldn't have been surprised when I later received two text messages, one letting me know he found the place he was looking for, the next inviting me again to his restaurant.

He might have had a clever marketing tactic to begin with, but his forwardness has all but ensured I will not be visiting.