I tried this on three of my own articles. It worked very poorly. There’s a lot of room for improvement before asking people to pay for it IMO. I may try my hand at writing one with the reqs outlined in the top comment just for a fun coding project.
Yes, you are right. There is still room for improvement and we will keep trying to make it better. The reason I added paid plans was to test whether people would be willing to pay for such a service so that I can spend more time in adding more features to it and making it better.
Fair enough, decent business strategy!