Allow me to chirp in if you will... I have a couple of aged dating domains I've been using to promote my own dating material.
As competitive as they say dating is, a lot of players have moved away from this niche, as evidenced by limited or no adsense ads for regular dating keywords such as "dating tips for men", "seduction tips" how to "seduce women" etc.
The style and format you mention, about a review site for multiple dating products, only started about a year or so ago - think Philip Mansour CPA courses, Amish Shah Magic bullet etc.
Seeking writers off fiverr is one way to do it, but then again, I'd just write a review based on personal opinion about the product you're attempting to promote - be this PoF (Plenty of Fish etc).
Personally, I've never outsourced the writing of copy or review material for the dating niche, reason being I'd rather write about personal experience about my dating, and what product would get the reader to the same level I am.
Instead of writing a review about a dating site or product, write about your experience about meeting women, the challenges you once faced, what you bought/read etc to rid you of those insecurities, then lead the reader to a couple of sites you "know" would produce similar results for your readers.
For ideas, I'd visit forums such as PUA forums and get some ideas about the issues facing noobs just getting their feet wet with meeting women.
This niche has been one of the most profitable ones for me I'll confess, and it never seizes to amaze me how many folks have moved away from this niche in the name of competition - WHAT competition?
Good luck.
