Feel a bit sad about the author but I suppose they did learn some useful things they were not aware before. As for resume builder, the market is extremely saturated, it peaked probably 4-6 years ago when quite a few people made some decent money selling fancy looking templates on Etsy or even rolled out dedicated websites for it. My advice for all aspiring developers- entrepreneurs is to spend less time on developer oriented websites like HN or Indie Hackers which are often just echo chambers. Go out and talk to people who do some completely different things and your eyes will open.