Is there any website that specializes in bringing the viral content and/or NSFW content before anyone else on the internet? Also, what would be the best strategy to promote NSFW content?
Are you talking about a site like Break.com or adult material? For NSFW sites, you have to think outside the box because you will be limited on who will accept your advertisements. But, there are ad networks that do accept NSFW sites. If you are trying to do SEO, then create quality content on your site or create partnerships (links or guest posts) with other sites in your niche.
one word : JuicyAds . You can buy cheap ad spots and make money with the same account ( banners, mobile redirects, popunders ) NSFW is easy to advertise. Pm if you need help