Personally, it's not bad. I'm an educator, and I charge. There are already different opinions. I signed up for several subjects myself. Time is limited now, and I haven't learned much. But personally, I think this effect is still ok. There are classes every day. If you are a formal student and have no time, there will be videos to download for your own study. Teachers who don't understand will also answer you. After that, good students who have accepted their own students will stay to teach and educate people.