The service isn’t widely known but has been active for several years. If anything goes wrong, you know who to reach out to: @massmux. He’s a well-known figure in the space, runs multiple companies, and is a regular at conferences. Just to clarify, when I mentioned “sell Bitcoin,” I wasn’t specific enough. The service doesn’t allow selling Bitcoin for fiat (which would require operating as a licensed centralized exchange or a P2P platform). Instead, it let’s you do swaps between Bitcoin, Lightning, Liquid, and similar solutions.