It’s webcomic romance stories. And the-billionaire-spends-all-his-money-on-me romance is a popular trope, out of others. There’s long been a market for this for late night binge read. 50 shades of gray also came out of this market. It is a bit different from the Pulitzer and NYT bestsellers.

You might also underestimate how many of your favorite writers ghostwrite stories like this for a side income.