it’s unfortunate, but I’m reaosnably sure that the reason they did it in the first place is because people are jerks, by nature. See, in the ideal world, the animationmentor characters are–since they are only ever seen in the videos of people who have passed the courses–associated with high-quality animation, and since they’re also associated with animationmentor, the equation follows in peoples’ minds:
animationmentor = mentor characters = quality
It should be obvious how easy this is to exploit. As soon as everyone realizes that these characters are becoming synonymous with good animation, in comes the wave of knock-off characters associated with rip-off websites, money scams based on the name, and terrible animation using copycat characters, and the equation is modified to become:
animationmentor = mentor characters = ripoffs, scams, bad teaching, terrible animation, generic character types = HOLY CRAP STAY AWAY.
As I said, it’s unfortunate that they’ve felt the need to get so grippy about it, but to be honest, it’s everyone else’s fault, because humanity–as a race of self-centered jerks–can always be trusted to exploit anything that is left open to trust and goodwill.