Reminds me of me trying to get those "Cheapest price guarantees" — had been turned back at god knows how many reputable retailers, and booking agencies with replies like "so sue us": Expedia, Booking.com, BestBuy, London Drugs...

I think, many of such cos keep a record of people going for such deals, and once you request a freebie for the 10th time, they look it up and blacklist you