Most omni crafters and gatherers have 4 or more retainers already. Many crafters I know have 6 retainers, I still have my 4. However I do agree with others about getting a free 3rd retainer. Yoshi said we couldnt get extra inventory slots because it would overload the servers with all the characters inventory increasing. But they could have easily added a free retainer while the servers were down for 24+ hours.