I don't see the point - what's wrong with selling business? Maybe he enjoys creating new brands/services and do not enjoy long term commitment to them. Example from a little bit different business - I've the uncle who's specialist in creating new branches for one of the biggest banks in my home country, he's responsible for finding the place, hiring the people and local promotion and after few months he's moving to different location and he's place is taken by permamant branch manager. I don't see nothing wrong with it. TLDR the whole story on LET so I'm talking just on the scheme and not this particular example.
While a good example, your uncle's situation is a bit different. Anyone signing up to the banks he opens is a customer of the bank, not him. When he turns over the reigns and moves on, he's not selling a list of client names/addresses/CCs to another person - those folks were always a member of the bank, and that particular branch simply has new staff.
A lot of the fuss is "He's not committed", "He opens brands just to sell them", and so on. A major concern that doesn't really get brought up, is that people should be made very aware of actions like this before they sign up with a company. Would you sign up with us if you knew we were just going to sell your name/address/phone/CC and VPS data to someone else you may not have wanted to do business with in the first place? And how would you feel if you signed up without knowing this was going to happen, and then suddenly realize that your information has changed hands, and there's nothing you could do about it?
Trust is one of those rare 'features' that few companies get right in this market. And I would have absolutely zero trust for putting my data in the hands of someone who is only looking to sell it off to someone else down the road.