According to the homepage of Paidera, we can make money by completing surveys and other tasks.
There are some issues on these tasks and surveys, but I will mention them later. At the first look, there is no way to figure out if these tasks are not real.
However, the structure of the homepage is pretty similar to some online scams that I have reviewed before. It was the stats, the focus to the referrals and the two comments of the testimonials without face that does not look real.
Most GPT sites focus on their offers, and they are proud of them. The referral programs are just something extra for those who can promote a website and generate traffic.