Walhello - Two search engines in one

I visited the Walhello.com Search Engine and it offered several interesting features. It actually seems to be two search engines in one. A priority search engine part which only contains paid listings on top and a normal free submission search engine. I was spidered by this search engine and they seem to use their own ranking algorithms. Another interesting feature is a ranking of websites based on the number of references from other websites to them.