I'm going to say that's the exception that proves the rule, assuming they were structural parts and not a minor controller chip for de-icing or something.

The company themself announced it without being prompted, and if whoever introduce these unapproved parts into a small number of engines is caught there's going to be real hell to pay. The stuff that stops you from falling out of the sky is serious business, and is largely treated as such.

On the other hand, a software function that's hacked together an inefficient will just fly below the radar, and most people will prefer two outfits to one that's actually well made for the same price, so quality goes right out the window.