Start telling people now, over on reddit. BEFORE they start cracking down. That way, everyone will know, and the growth will happen even more rapidly.
Why should I use Lemmy or https://reddit.com for consuming pornography rather than https://danbooru.donmai.us/ or https://gelbooru.com/ or https://e-hentai.org/ or https://realbooru.com/ or even https://pixiv.net or https://www.deviantart.com/ or https://pornhub.com
The differences I see between link aggregator websites and those websites are that link aggregators have worse discoverability (it's useful to have tags to search for and a hyperlink to the original source of a piece of content) and comment threading (and comments on pornography are basically useless to me). I don't see how directing people looking for pornography to a link aggregator website rather than a website dedicated to providing it will be helpful to me.