Would you "rescue" a pet from the pet store?

There is no chance for authority to intervene in the case of betta fish being kept in cups. It is the same way how betta fish are treated everywhere in stores. Most people don't even know this is wrong because they have misinformation about how betta fish can survive. It is only cruel in the eyes who know how to keep fish, because no betta fish can survive for long in a cup with no filtration and heater. Reporting such incidents will not have any result but having authority laughing at you.

No, we are not talking about shelters here. Just pets from pet stores.