I want to gauge interest in my cross-promotion marketplace before I commit to building it. I created a small landing page to collect email addresses. I want to see if I can get 30 people to give me their email. I'm planning to email some of the people I interviewed to get their feedback and I'm also going to post to IndieHackers to see if anyone's interest.
It's called CrowdMagnet and here's the landing page: https://www.getcrowdmagnet.com