Here's my point, have you ever frequented any of these sites? Ahh it's not worth my time to justify why these sites are a total waste of my money. Do they give you click/impression/any kind of data? Spending money where you cannot quantify results is just a bad business decision. But if you think paying for any of these sites is a good idea, well I have phrase for you.
"Want to buy some swamp land in Florida?"..it's a better investment.