If you pay for a group and don't get carried and contribute to damage and don't stand in the AoE/LoS attacks then I'd say you rented help. Some people have plenty of gil and lack the patience to try the 50th (or more) fail because someone in the group cannot dodge anything to save their life. Also if you are any class with the exception of the WHM/SCH one could argue that in a way they carried you as it's the job that has the least wiggle room for failure.