Since the fish have clear spawning periods in nature I don’t believe it is good to keep them spawning constantly. They will get exhausted and die young. This is one of the reasons I don’t change water often. I mostly do it when I think it is a good time for them to breed.
Fish (and especially paros!) adapt and specialize to the environment they live in. For paros this is acidic and soft water with clear spawning seasons. Because they specialize to this environment they lose the ability to thrive in other conditions in a certain way. We experience that when they are put in wrong water. I believe this also goes up for spawning seasons. Paros are adapted to spawn in certain periods. Spawning them constantly means going against nature, which can only harm the fish.
Nature always knows best, so I have a strong tendency to believe her.