It is quite simple how to monetize sites. If you have an ebony tube, then you know what your audience is looking for and you just need to give them something related, so either promote paysites in that niche or cam sites, they can do well too.
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You need to add new content regularly, but it is all about quality, because it is what Google wants, you need to rewrite the titles for your videos and getting good backlinks will help too: https://mradultaffiliate.com/topic/how-to-get-free-backlinks-for-adult-site/