Well, webnovels are usually made to waste time. The time commitment required to write and read one is high, and like long running manga, they tend to try to keep the reader hooked on diminishing returns (usually).
Most people on SH are a minority in what they like to read in the United States. You go to Korea, Japan, China, the majority there like webnovels. That’s why there are so many more webnovels coming from those countries.