Your friend is just trying to get himself another 2 slots while you get nothing. You only get something when someone refers YOU. Sprint is one of the only companies I know that a referral results in BOTH parties being rewarded.
So if you entered my referral ID which is bnd, I would get a referral point towards another 2 slots or other 'upgrades' like 24 times/day stats update, high CPU priority, etc. but you would get nothing from it. You can refer anyone you want but be aware it will do nothing unless someone refers YOU.
Thanks, I kinda figured it was BS anyway... oh well, I got my server and it is GREAT!