Earlier this year I unsubscribed from their newsletter. The unsubscribe page had a feedback survey stating that a reason was required. That really put me off. You can't require someone to give you feedback in order to unsubscribe from a newsletter (it may a violation of canspam, as well). I tweeted about it. They tweeted back an apology, saying it would be changed, but by that time the damage was done re my image of the company.