why would someoen get a domain from u when they could jsut register at the place ur reselling for? do u hope that they dont know of a cheaper place?

does it once again boil down to custumer service?

whoops. can u move it for me. sorry about that

because sometimes you resale for places that only sale to resellers :D

in the case of enom, resellers can sell at a rate much lower than the $29.95 that you would have to pay, if you dealt with enom direct.
other registrars have similar setups.
also in the case of opensrs, you cannot deal with them direct, you have to go via a reseller.