Just seen this comment on another post “I was about to say the same. I don't know why people don't agree with their methods. They don't do anything cruel.”
On the home page of their website they have a picture of a dog wearing a prong collar, and often write posts advocating their use. Just because someone has a lot of Instagram followers doesn’t make them reputable, it makes me so angry that people don’t do a bit of digging and research into people they recommend.