These people who spam are silly... Why would you do that? It's also a federal crime under the Can Spam Act here in the United States. In any case, I turned a $14 text ad with facebook into $300 a few years ago promoting an online casino (before the new regulations and such - not allowed anymore). What a deal!
Facebook ads is great for promoting dating offers as you can probably tell by all the people doing it if you've checked out their ad board I've had tons of success running offers from Neverblue, Azoogle, and Rocket Profit. Make a few different accounts and look at the ad board. You can see what kind of stuff people are doing and what works by how long it's been running. For those that wanna give it a try, as far as I know, the only working coupon left is if you add the Visa Business application. Here's the link: http://www.facebook.com/apps/application.php?id=24249628048 - You get $100 free to test it out. Add the application and they'll send you an email with the coupon code in it.