Amazon Mechanical Turk is a service that lets you make money online through doing paid microtasks. Each task is something simple that requires human interaction like rating search results, checking for the right spelling on search terms, categorizing the tone of an article, or even basic translating. You can do these tasks from anywhere you want and make money online from the world’s largest e-retailer.
This is the oldest website monetization trick in the book and plenty of dating sites still choose affiliate networks as part of their overall strategy. In most cases, the CPA (cost per action) model is preferred by both dating sites and affiliates, but sometimes CPC (cost per click) can work as well. Increase your odds of success with affiliates by displaying deals from businesses relevant to the dating industry such as florists, jewelers or candy stores. If your dating site is niche, consider working with affiliates that cater to that niche.
As a customer, I find that the dating sites with glossy stock photos of beautiful women and men look a bit suspicious. I even saw someone release a live site with the demo member photos still in place! It's a bit of a Catch-22... You have to have members to have a good site, but you have to have a good site to get members! With a glut of dating sites, I think coding something original is the way to go. It's a great way to learn programming!
Offer crazy guarantees: "Find your soulmate in SIX MONTHS or we'll give you a free [offer here]". There's two possible outcomes: One is that your membership base will grow in those six months, and the probablility for any member to "find their soulmate" will increase. The other possible outcome is that they will not find their soulmate, and you simply give them what you offered for free. If you're smart you may simply offer something that they will get for free anyway, but is hard to find, such as an affiliate deal where you even get a commission for offering free stuff to your members (such deals can be found in various affiliate networks).