E-mail searches can be conduced via most of the people finder search services listed. Again, the use of several sites increases your chances of success. Search engines are free to the users because they are supported by advertising dollars from advertisers. One of the evolving issues is the complicated relationship between advertisers and content providers. Search engines directories that attempt to catalog the contents are in the midst of a sometimes controversial question about where the line is drawn between advertising and editorials.
Some advertisers pay for their sites to be listed on certain search services.
This means that their sites get priority in a listing of search results. Other search service sites make agreements to post links with the commercial vendors on their directory pages. Essentially, this means that the user should be wary of advertisements being presented as content or of skewed search results. If you'd like to learn more about power searching on the Web, there's no better place to look than the Web itself. There are a number of tutorials dedicated to teach you how to search effectively on the Internet.