Similar websites

Has anyone else noticed these similar looking websites?
http://www.buydig.com/
http://www.beachcamera.com/

Google Offers

Competition for group-selling sites such as Groupon
https://www.google.com/offers

Best cash back credit cards in the US

http://creditcardforum.com/content/best-cash-back-credit-cards-4/

Looks like I will go for one from Amex. Dunno yet if I should get the Costco one, or one of the Blue Cash ones.