Fly your colors
Free launches earn their do-follow backlink by flying the ShipNest colors. Add this to your site (replace your-ship-slug), then the harbormaster verifies it during review:
<a href="https://shipnest.dev/ship/your-ship-slug"><img src="https://shipnest.dev/badge.svg" alt="Sailing on ShipNest" width="200" height="54"/></a>