Only a good review can answer this question.
So we wrote it for you!
We will not claim that this site is not secure ...
But registering yourself there is simply not necessary!
They are not themselves a survey company / research agency, but a cunning intermediary who wants your e-mail address and then only forward you to the real survey sites. They get paid for that.
But you can also simply register yourself immediately with the 10 best paid survey sites in the Netherlands or Belgium.