None - This is straight from the search engine. No filtering at all. You might use this option if you wanted to gather more pages that matched your keyword search then the real search site offers. Penalty - This is similar to the None filter above with the exception that web sites that attempt to manipulate the order of the search engines are returned further down the list. Detection of sites that attempt to manipulate the order of the search sites is currently detected by the following ways.
Pages have the same title as other different registered pages.
Pages have no summary information. Pages have no content and contains only keywords. Pages have the same summary information. You only see the output from the filtering of these results which is closer to 20-50KB of information. As you increase the maximum number of results, the returned information will generally be larger but also offer more unique sites that many times are hidden in the pages of output returned by these site engines in normal operation.