What To Promote On Facebook?

Lets say you have a tool, that can post thousands of messages or comments on facebook groups... What would you promote to make the most amount of money in one day, without running the risk of loosing commissions? or getting caught by anti-spammer idiots.

ive been spamming facebook for about a year and had no problems i promote dating sites on a per lead basis with good results from facebook

how do you spam it? where can I get such script or program?