To quote Thomas Heed, when all your email says is "buy, buy, buy" you can count on your opt-in audience to say "bye, bye, bye."
I can really tell it is holiday time by all of the junk email I am getting from retailers. Hey, I opted in so it must be my fault for getting all of this junk. Well, I guess I will solve the problem by opting out.
Bye-bye Sam's Club, Amazon, Dick's Sporting Goods, Finish Line and a few others. I only hear from you when you want to sell me more stuff. You never really bring me any value or information - only pleads for my business. You all squandered a potentially good relationship. Looks like you all need help managing a relevant email campaign.