While cubelagoon does work, I believe it is a stupid waste of time. This is an opinion, but here are my reasons.
1) You are giving away your email address, home address, phone number etc, which allows EVERY company that you fill in a survey for to send you countless amounts of spam.
2) You spend a lot of time and effort doing it, and get very little out of it.
3) Its much faster and easier to get a job either out of the house or from your parents to make money. And you will earn as much money in a day as you would in a few weeks on cubelagoon and those kind of websites.
With this being said, I would recommend not using this or other websites of this type, and use your time more wisely.