They have very low pay per lead program and it does not convert well these days, but i am sure they will pay as long as you send them legit leads, they are one of the biggest indian websites.
I personally do not have a good experience with them. You need to follow up for your payment as them have hundred of reasons for delayed payment more over they give falls assurances.
I am one of publisher of shaadi program since 2 years ago to suddenly. I have got payment from shaadi for about $125 since last 8 month ago. Average I can got about $10/Mont from shaadi with my traffic about 800 uip/day I think shaadi.com is ok.