Hi laurentl
That is an excellent question - in fact it's exactly the one I'm trying to answer with this MVP of Trolley :)
Right now I've "launched" on HN and IndieHackers only, and I'm focussing on software, lean-startup folks to gather feedback.
Next up will be questions around digital downloads ("information products" and other things), so I'll need to engage more with those communities. I don't believe they're well served by Etsy, though they do have alternatives.
Right now it's all about learning where our product and markets best align - and the feedback I'm getting here today is enormously valuable. Thanks!