I received a comment about doing surveys, wondering if they are safe and worth it. I have to say yes to both. I have been doing surveys for a long time, probably about 4 years and have earned quite a bit of money from them and been able to test a lot of new products too. I have a lot of fun with it and have been pleasantly surprised with the amount of extra income I have been able to receive. I know not everyone thinks it is worth it, but for me it is. I log on to each of the sites every morning to see if there are any invites, even though the invites come in my e-mail. I have found that just be a quick logging in and having that activity in my account, has increased the number of invites I have received.
Now, as to whether or not it is safe, I am not sure what you are asking. Typically I receive checks in the mail for my payments, so the only info I am giving out is my address, although some sites will pay you through paypal. You aren't giving out your personal information or any bank account info, so I say yes, it is perfectly safe. Please let me know if you have other concerns that I am perhaps not thinking about. But in answer to your general questions, yes I have found it to be both worthwhile and safe.
In fact, just this weekend I was chosen to participate in another study that will require 2 30 minute sessions and will pay out $85! Not too shabby. :)
I welcome any questions that you might have about surveys though, and mystery shopping, this has gone fairly well for me also. These are fun to participate in and the payout is nice too. Of the two though, I prefer surveys because I can do them at home and on my own time schedule. :) And in my PJ's if I want!! Ha!