Many foods now say "refrigerate after opening" and they didn't 20-30 years ago. It all comes down to liability and insurance, not that it needs to be done. Ever wonder why vinegar heavy or salty foods sit on counters? They do not go bad easily. Soy sauce, fish sauce, hot sauce, mustard, ketchup and so on.
Now then, the more junk ingredients added to a product, the more likely it could go bad - so buy the real stuff, with only what it needs ;-)