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Definitely agree with the others, they have some great suggestions. Another idea could build upon what was already said. Have you considered hosting more creative forms of content on your blog or website like infographics (could be a great way to display survey results or scientific data) or videos? The infographic / more visual content would be a good way to lighten up serious data and statistics and the videos have the potential to be funny and lighthearted, which lends itself to sharing. Also, have you addressed FAQs before? Whether they are about your site in particular or about online dating? Addressing these questions and "myths" in a creative way might get some attention. Get creating and be sure to execute things properly and I think these could be great link-earning content pieces.

import.io and it's free

If you are doing a link cleanup I highly recommend cognitiveseo.  It takes all links from Moz, ahrefs, majestic as well as allowing webmaster tools imports.  You can categorise your anchor texts, and it will run its own system and recommend links to disavow which you can manually review. On top of that, it will also create the disavow file for you.  Saved me a alot of work when I got hit by some negative seo.