How to market to Etsy Sellers?

I am developing an app that allows Etsy Sellers to directly import their data into Google Sheets. I am still working on an MVP, but have been trying to get some user feedback.

Does anyone have experience on best ways to find Etsy Sellers?

I have been temporarily suspended on the Etsy Forums once for promotion. I have also had multiple posts taken down in FB groups. Seems many of these groups are against promotion. Is Reddit better?