money with SMS

hi, do you know a society who offer you a number, and when someone text what they want to this number (hi, thank you, okey, lol), i earn money ? not something like send HELLO to 84654 but just send whatever you want to 8454 and i receive the money on my account.

i've receive a spam like this : well hey, kept ur email from bing mem search a little bit ago are you still available? lets meet up 914-278-1487 txt me!!!

so i want to know which society this guy use to earn this money, he tell me to send what i want to this number and he will earn money ! please help

They use services like Fortumo SMS, google it, you should be able to find it as first result.