After how long are your tomatoes going back in the frig? (I’m not talking taste here, just spoilage). Once a fruit/vege is ripe, if it’s not eaten, the ripening process will take it to its conclusion – rotting of the fruit/vege to expose the seeds to allow it to replant in the soil. This is how plants/trees have progeny. Their seeds (inside of the fruit) is protected by the edible part and then once the fruit has been removed from around the seed (either by eating it or by rotting away), then the seed when left alone will eventually be covered by soil and another tree/vine will grow. The warmer the environment, the faster the rotting will happen. So again I will say that if you want to preserve your tomatoes for another couple of days, keep them in the frig. They may not be soooo tasty, but then you’d better eat them right away when they’re ready.
BTW – I’m in EY, so we don’t have the supermarket effect on the tomatoes.