Back in the day (this particular day was '95) the prevailing wisdom was that $7.00 was the absolute TOP CEILING that anyone would pay for a golf disc. There was the potential for better plastics, but that would cost money. One this discs golfers had consistently been up to that point was allergic to spending money. So it wasn't done.
At this time Discraft had by far the best plastic on the market. It was the Tournament Pro or "Cyclone" plastic. Innova plastic sucked in comparison. Innova wanted to introduce a better plastic, but it would cost more like $10.00/disc than $7.00. A lot of people thought the idea was doomed, that there was no way disc golfers would pay $10.00 for a disc. Millennium was a partnership between Innova and Circular productions. Innova would make the molds and mold the discs in the premium plastic. Circular productions would sell them as Millennium Discs. That way if the idea was a bust it was Millennium that failed, not Innova.
But...it worked. Within two years Innova launched it's own premium plastic line, undercutting Millenniums position in the market. After a while Innova sold out their stake in the company back to Circular Productions. So now Millennium is still there and Innova still makes the discs, but the partnership is over. Evidently, it's not working out all that well. Millennium is kinda stuck, because it's not like they can shop around for another company to partner with. Their best selling disc is made from the Aviar mold. So the ball is in Innova's court. Whatever becomes of Millennium Discs, it will be Innova that makes the decision.