So spend 7 dollalrs and get 4.40 approx seems like crappy deal. Only way they are making money if if it's automated and does not use human services. And if that your talking about thousands of views and sends. Unless someone knows some site that solves 5k for on average less than 4.40 dollars.
Some people do resell tokens for captcha services for lesser price, and no thats quite an unrealistic calculation you offered. You can get much more captcha solving token for lesser amounts. And some services like 9k.eu offer P2P captcha solving.