Affiliate Marketing Secrets

SO this rapclique in my town is really getting big.i no all the people in it and it just started so i felt i should be apart of it and catch this plane before it takes off.i asked the member i was closest to if i could be apart of the team and he told me i can be affiliate.what exactly does that mean and if i work hard and put out good music do u think most likley there just gonna want me as an official member?Most people that tried to get in just get told no.