You are visiting scam websites. First of all you never have to sign up to get online coupons. I hope you didn't give them your credit card number. They are probably using your personal information to market goods to you. Simply visit legitimate coupon code provider and get the discount code you need for free.
I found some interesting coupon websites:
http://www.catalogspot.com/
http://couponsheap.com/
http://www.ediscountshopping.com/
http://www.hotcouponscodes.com/
I use http://www.findtopdeal.com for Amazon coupons, coupons.com for other general coupons, groupon for local deals.
Groupon! It is the best thing ever! They have really good deals, ad they always update their stuff!!!
I found so many websites that claim they have coupons but they all seem to direct you to other coupon sites and then those always have the same coupons up, they never put up new ones!! I've signed up for these coupon sites but its getting frustrating seeing the same ones constantly. Why???? What sites do you use?