Comment by pchm

I run https://pixelpeeper.com on the side.

It's a micro-SaaS for photographers who edit in Lightroom. Lets you reverse-engineer Lightroom edits from JPG files and download them as presets that you can apply on your own photos.

Took a month or two to reach $2k/mo, riding the wave of instagram's popularity in 2017-2018, plus the project went viral initially. However, the niche is ultimately too small to grow the revenue significantly. Still chugging along, almost 6 years later, though.