syrp

I've seen some stuff on indiehackers (https://www.indiehackers.com/product/park-io) that are just a simple script turned into $125k/month (obviously they also grew the complexity as the user base grew), but anyone know of any other interesting companies that had very simple origins.

I started startakitchen.com as a way to aggregate a bunch of stuff about cooking supplies, recipes and instructions. It was well received on the cooking subreddit - but I don't know how to turn it into a simple idea that can generate revenue. Anybody have any ideas to expand on this?