U.S.A. Smart Shoppers

I have been receiving calls from the number ###-###-#### for the past 5 days. The people say they are from different companies and sometimes do not want to give a company name or address. They are offering free $100.00 gift cards to the person if they give their address and name. One person said his name is [redacted] and from U.S.A. Smart Shoppers in Phoenix, Arizona another person said the business name is Walmart Free Shoppers and he needed an e-mail address to send the company information to. He wouldn't give me an address at all. I think these people are scammers.