Thank you for all the helpful replies! Sorry for taking several days to reply here.

Yes, I think we'll wait to move the topic to the Exchanges board once we launch for real. But maybe Project Development is also not the right place, as right now I'm looking for users to test the exchange, not developers to help me with issues. Maybe the Service Annoucements board is a good one for now.

I really like the idea of running a signature campaign once we launch! Thanks for the suggestion. One thing I wonder is how to approach trusted an experienced users for such a campaign. Obviously everyone carrying our signatures would have to put a lot of trust in us, and as you've mentioned, it is hard to join or recommend an exchange without an established founder, and I'll have to work hard to become one.

How can I approach experienced managers for help related to a signature campaign? I'd love to explain the project in detail, giving as much information as needed, so that some trusted members in this community can verify that we have a serious project.