I watched youtube video and an ad came out, called Grammarly.<p>https://www.youtube.com/watch?v=VueSBzrIh1o<p>As it said, it provides grammar auto-fix for people. And it said it's better than MS office.<p>So how do you think they make revenue? I saw it's a free Chrome app, actually, no charge...<p>I am wondering how this startup survives.<p>Welcome to comment!