Whats the legit and / or proper way to capture dating leads?
My idea: Send user to landing page, let them enter there info, hit submit and pre populate their info to some actual dating offer.
Problem: It turns into a 2 page submit (enter info on landing page, click submit, click submit on actual offer again) - if done legit they will also get 2 emails to to approve their registration.
In other words, the method sucks donkey b@lls.
Whats a proper work around? Capture the leads on my own backend and mail them non compliant? Is it worth it?
The whole 2 page submit thing for a dating offer will certainly affect the conversion rate.
Lets brainstorm and throw some ideas around 
Find a dating offer that allows you to submit via API?
You'd have to find offers that allow you to repopulate the user's info to their landing page yes!
For the email confirmation, not necessarily , get response allows unconfirmed opt-ins, they're affiliate friendly, and cheap ! 
Mehdi
Yep look for merchants that allow you to host and post. They exist once you've ran and prove quality.
Thanks guys! What about my method? Is that actually sustainable or are there more advanced and user friendly ways to do that?
You could run into some trouble with the advertiser seeing you doublefiring leads if they have an extensive back end... Just be sure you know who you're reselling the data to and you should be fine.
If you can't get host and post going, you could always try getting creative with it...so for example after they enter their details on your lead capture you could have a redirect dialogue that would popup saying "Based on the information you've provided, we've found an excellent site for your needs. [Name of dating site] is now loading." - you could also try something on the initial lead capture like "Please enter your details so we can find a site that best matches your needs" or "[Dating site] is periodically closed to new [gender]s in various age groups to ensure a balanced gender ratio. Please enter your information below so we can determine if you are currently eligible to register."
You'll undoubtedly lose a few leads in the process, and I'm sure there are more creative ways to do this than in these basic examples. The point here is that you can probably angle this in such a way that you do a lot better than you would if you just redirected them from your own lead capture to the dating site.