That part of their website seems to show some concern for ethics. They don't seem to be out to make money, they don't demand a set fee, only what people wish to donate or if they have no funds, labor or other items.
But frankly this group seems to rely on a lot of dubious teachings, Castaneda, alleged Toltec seers (when the Toltec have been gone for eight centuries), unnamed South American shamans. Grover Horned Antelope may be the only legit person they spoke to or learned from, so hopefully at least no one gets harmed in their sweats.