Well, imho, scam is not necessarily take away your money. If you give something (your time, your personal data, anything, your signature) because you are promised to be rewarded, but in the end the person/entity is breaking their promise, it might be called scam/fraud.
And BTW when you give your data freely they might sell it to some people, and many people willing to pay for personal data.
Exactly, time is very precious so if you waste your time filling forms and at the end nothing beneficial comes out of it, then I can boldly say you have been scammed. What about the anticipation the induced you into and the failed promises? I don’t think scamming is limited to someone taking something from you and refusing to fulfill his part of the deal.