Kni8ht Viz's Shonen Jump manga site allows readers to read everything in their library for $1.99 per month. Of course, it's manga instead of web novels, but it's legal way to support the authors and artists and a lot cheaper than web novel. You can also read the first three and most recent three chapters of a series for free.
It isn't web novels, but it's perfectly legal and might be something you consider jumping ship to. For a reading addiction, it's much cheaper.