The consumer isn’t a moron; she is your wife. You insult her intelligence if you assume that a mere slogan and a few vapid adjectives will persuade her to buy anything. – David Ogilvy
Many times, this is actually where companies fail — it is when they misinterpret consumer behavior thereby coming up with obvious and childish schemes.
Consumers always think for their best interest, whether price or features. And this varies from place to place. So, if your marketing strategy just relies on sweet-talking or freebies without really meeting their needs, or considering competition and lifestyle — I tell ya, you’re out of the picture.