Not 500+$/month by any means, but 100$/month. I got 2 subscribers who are older clients that I had to convince -hurray for hallway testing- and I hope to get more soon. Having an actual pricing page and payment funnel might help haha.
It's a dead-simple data exploration and prediction micro-saas, but with a lot of nice pixels and state-of the art AI/ML explainability algorithms. Users come with their prepared excel files, upload them, and they get an 'explanation' as to the relations their data has within itself. It can also work as a prediction service.
For example: It can help a marketer know which prospects are likely to buy (prediction), but when said marketer has too actually talk to these prospects we can help with tailoring the message with the right knowledge (this one will buy because he/she buys like clockwork, whereas this one will buy because we saw them several times on our webpages)