It seems to me that if this is a trick to suck extra fees out of a student, then it's a scam and you should walk. If the lessons are legit and the material is worth learning and the training makes you better, than all the steps between now and the end of your training are just small stops along the way, and the actual number is unimportant. If there were fifty belts to black, and my goal was being a good martial artist, than only the material and the instruction would matter. If there were fifty belts to black, AND ALL THAT MATTERS IS GETTING A BLACK BELT, than I would feel ripped off.
Ultimately, a student need to decide whether their goal is get a black belt, or be a strong martial artist.
I had a student tell me the other day that he felt like he had been in the same place in his training for a week and half. I helped him to find some perspective and reignite his passion for martial arts, but I was thinking, "Man, you need to not measure your growth in week and a half intervals."
-Rob