sandwich on Nostr: Probably not very effective. IMO what you should do is look around for discussions ...

Probably not very effective. IMO what you should do is look around for discussions about people who are sick of discord. There are many such discussions. Participate with relevant discussion and link drop at the right place. Gamers are the perfect market: they have technical acumen, are naturally decentralized and despite authority. SEO for generic terms in a crowded market can always help I suppose, but a more targeted strategy would yield better results.