Are these sites valid or just scams?

Lakshmi asked:

Sites like
http://dataentry-jobsearch.blogspot.com/
http://online-survey-income.blogspot.com…
http://www.smartdataentry.com/
http://www.dataentryportal.com/
http://www.home-profits.biz/
http://www.googleadvertise.com/
http://www.online-dataentry.com

these sites says that they give home based jobs. R they valid sites or just scams? Why do they ask for registration fee? why cant they deduct it from the salary?

Gorman

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