Purpose of paid-to-search sites

Can anyone tell me on what’s the real purpose of the paid-to-search sites? It’s simple. It’s all about competition, and getting up to the SERPS of Google, Yahoo and Bing. Since they were search engines, they are way down below because most people don’t like to search there; instead they mostly use Google, Yahoo and Bing. Paid-to-search sites wants searchers to get paid daily, but only centavos. As an affiliate, it’s better to earn little cents than nothing. They want to move up ahead of Google, Yahoo and Bing, but definitely no chance. These three websites have the best tools and services which satisfy their customers, and eventually have their own big companies. Paid-to-search sites are just making people attract by getting paid, but not good enough. Google already has Adsense, and perfect for SEO too. Most of the paid-to-search sites are not good at all, especially in SEO.