Yes, with bombarded ads they do earn but greed can't allow them to improve members earnings. They're just trying to earn alone given you pennies for your time, and data sacrificed for them.
Yes, I remeber a couple of paid to click websites like that. They do indeed earn a good amount of money. This thing is not just limited to paid to click websites. I have seen that many faucet websites also do the same thing. Many faucet websites are filled with pop-ups and unwanted ads. Having said that I do NOT have any problems with such advertisements. The only thing I am concerned about is that they should also pay me a good amount of money if they are themselves earning good money.