bkkguy, I've no idea why they have decided to sell up shop. I can only think of reasons that would cause me to make a similar decision; viz

A) I'd had enough and decided it's time to move on to something else

B) profits were not considered sufficient

C) I was not willing to see a rent increase further eat into my profits

So far, we've only heard about a rent increase which they are unwilling to accept. There is no indication that they have been incompetent businessmen.

Businesses change hands all the time, for a variety of reasons that we are not privy to.

I'm presuming the member who posted about the rent increase got the information first hand.

At the end of the day, your guess is as good as mine.