The problems with going pro as a web novel writer are managing expectations, deadlines, your relationship with readers, and many other things. Many burn out to reach success, sprinting to the first milestone--making enough money to live comfortably. However, once they are there, they will realize that it takes much more to be a professional writer, that it's not just about reaching the threshold of money, and that you can fall down from that pretty quickly. In fact, I almost became a big shot in 2017, in Italy; but that didn't pan out.