Other classes

I am wondering why (once we are fully certified) we can't select a pattern that is sold at Michaels and uses Michaels supplies for a class. Or devise our own patterns which use Michaels supplies to teach a class. Our certification contains training on devising appropriate patterns, and gives us instruction on how to lesson plan our own classes. Is it Michaels that would prefer that we not do this? Or is there a way to arrange with Michaels (ie submit our patterns for approval) to do so?