1) Is that they're a megacorp (who also happens to run the most prestigious BJJ-focused tournaments). They have a crapton of affiliate gyms, and that's scary. They have a certain way they expect the business side to work (i.e., I've visited GB gyms that demanded GB gi's were the only acceptable Gi's, have certain sales tactics they all employ, etc.). It's very efficient as a franchise. A lot of the critics of GB are pretty much put off by that fact alone; it reminds them of the tae kwon do chains. In reality the quality is across the spectrum (there are world class competitors who fly the GB colors, and since bell curves are a thing, naturally there will be some lower-quality schools) as with any school/affiliate system, but it's easy to forget that fact sometimes. They also tried some shenanigans regarding exclusive in-house GB tournaments, but I don't know if that ever actually happened. It was like, 8 years ago?