Affiliate Programs Standard affiliate program50% and co-branding partnership

[Catadd]

i've found affilite program http://partner.doulike.com/standard.php.
wanted to know your opinions about it

I'd like to find out whether it is worthwhile becoming a joint member of an affiliate program and how rewarding it is in terms of revenue.
I'd like to learnt more about the target audience of dating sites, meaning their age, sex, etc.