Dating continues to be one of my largest niches, and has been for a few years. However, that does not look like "Buy ads, direct link". I have negotiated direct deals, have a back end email monetization strategy, etc.
The question should not be "is there money in dating" but "is there money in my traffic for the offers I have access to and the way I promote".
based on your original post, looks like you have your answer. Now, what are you going to do about it?
what you can change:
traffic - social, seo, email, ppv (different countries, etc)
offers - direct deals, aff offers, etc.
promote - direct linking, your own ping tree, etc.
The only constant in this business is going to be change, ESPECIALLY when you are selling leads to someone - we are just fill in for when their direct budgets are not doing the deal.
Take an inventory of your strengths - what is it that you have working for you. Keep those factors constant, and rotate the rest.