I think some of the people in here don't understand that CL is just used to harvest emails. You hold on to those emails for a couple weeks, THEN you send them ecards, as a totally different person. I did this exact thing sans the ecards (just flat out email spamming) but I love the ecard idea. I never shared this to prevent it from getting saturated, but since this thread gave me the awesome idea to use ecards, I'm gonna give something back.
Instead of dating and cam sites, what you guys need to use is FLOWERS. (USAFlorist.com, JustFlowers.com, GiftTree, ect.) When someone buys flowers online that's a conversion for the advertiser. There's no need to worry about free/paid profile ratios or any of that shit. So what you do, is send a secret admirer card to your harvested email list. (This list is already geo and niche-targeted if you use craigslist to harvest them) In the ecard you give them your email address to reply if they are interested in meeting up. Then you give them a link to the flowers you want them to buy for you. Getting a horny perv to buy some flowers for a date is easy, trust me. Thats it. I'm sure you can figure out the details on your own. (If you can't, well....good luck)