Won't guys like this https://www.youtube.com/watch?v=K8kua5B5K3I https://www.youtube.com/watch?v=K8kua5B5K3I get affected? If all they can do is mine but not ca

Won't guys like this https://www.youtube.com/watch?v=K8kua5B5K3I https://www.youtube.com/watch?v=K8kua5B5K3I get affected? If all they can do is mine but not cash out, what happens to the network transaction speed and the overall difficulty?