I think they're most likely targeting players who can't purchase the Level 81 balls. That is to say, they're targeting lower-level players. I believe they set the Level to 0 for the Max Platinums.
Now, should those players be purchasing such an expensive ball when they're probably not going to really be able to take advantage of its capabilities? Probably not. Still, I think that's WGT's target: players who think they just need a better quality ball to shoot lower scores.