They also say "domain unavailable" if you include "godaddy" in the domain name. Any other site will let you register profane domains with "godaddy" in them.

I wonder if they'd allow you to transfer such a domain to them.

This is 100% clickbait for lazy people. I can't believe this is on the front page of HN when plenty of independent trail developers build awesome tools for finding new hikes and have shared those tools in the past on HN.

For reference: https://www.reddit.com/r/traildevs/