If I wanted to share a project anonymously I would post it on getwired.app and @ a few people like nostr:npub13azv2cf3kd3xdzcwqxlgcudjg7r9nzak37usnn7h374lkpvd6rcq4k8m54 to repost it to the wider community. It uses proof of work so is somewhat spam resilient. But what do I know, I'm just a fucking retard.