Cable plan with free inet?

[Davislovesyou]

Hello, so about three years ago my friend referred some guy to me and apparently he could give me free inet. And so I called him to see what this all about and he told me to get a 30$ A month tv cable plan and he would sell me a premed modem for 225$ and it will get me free inet. Forever. So now I have a bundle package lol but with the price of just the tv cable. So can someone tell me how this guy does it. Educational purposes only ofc btw I use spectrum.