Sometimes the business can be spotted in a Thai Business Reseller Facebook group typically with the comment "Must sell fast, already moved to another province to take care of family member" or "I'm too busy with my other business to manage the shop now."
I've visited some of the locations out of curiosity and can speculate why the business had to be closed/sold:
1. PARKING: Extremely busy road but no parking anywhere within 500m.
2. COMPETITION: Good location but 10 other similar shops opened within 2 km stretch of road. Maybe even 20 or more within 5km radius.
3. OVERHEAD COSTS: Great location but monthly rent is far too high.
4. LOCATION: Great product, but located too far away from target buyers.
5. PRODUCT COMPARISON: Attempting to sell an inferior product at a similar price to a premium product nearby.
.... just to name a few ideas...
Despite this, I still see someone buy it, re-open the same business, and go through the same struggle as the first owners....
To be fair, I've also witnessed some shops have amazing success, seen the owners become millionaires after lots of hard work, organic expansion, unique product, maintaining high quality standards, buying old houses and tearing it down to become a parking lot for their shops, etc... It wasn't a case of mafia, corruption, or rich parents, just good business practice.