This FAQ answered the question of
Do you pay me for participating in experiments? How much?
I've seen that there are Sessions with free places in the calendar. Why I cannot register for these sessions?
Who can apply for a subject account?
Do I have to show up when I am invited to an experiment?
How can I cancel my registration for an experiment?
Should I put in fake information when creating a subject account?
What is the meaning of the three question marks "???" after an experiment under "Experiments you participated"?
I have registered for an Experiment, but cannot register for all the other experiments, because they disappeared!
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