Not entirely main source, but a considerable source. I have three projects https://flurly.com https://flurly.com makes around 300/mo https://graphjson.com http

Not entirely main source, but a considerable source. I have three projects https://flurly.com https://flurly.com makes around 300/mo https://graphjson.com https://graphjson.com makes around 1500/mo https://beamanalytics.io https://beamanalytics.io makes around 20/mo What's amazing is how little additional effort these projects need to keep growing and earning income!