Get Paid to sites, Do they really worth the time and effort?

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I've been intrigued by this sites for many months now after stumbling to one of this. They seem good source of extra money. The tasks seems easy and effortless. Many pictures of checks sent to their members have circulated in the world wide web like mushrooms. Are this sites really are worth trying for. Are they legitimate or not. Would this site endanger your identity because some many of the offers requires your address, name, and sometimes social security. This sites are not regulated by any agency and they seem to close whenever they want. Not paying their members.