I am interested in using the "collect e-mail addresses separately" function, since I will be offering people the chance to enter a giveaway upon completing the survey. I found it quite enticing to do so, since their emails won't be collected together with their answers.
However, I'd like to know if I'd have to sign a GDPR/DPA contract in this case, as I have not fully understood that from the manual.
And my second question: would I have to start paying money / have to sign up for the paid SoSci tier in order to collect this data? I am a University student and I am doing this for my Bachelor thesis.