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.
It is not necessarily but it will just go to that way. If you give anything to a person whom you trusted and turns everything into ruin, it might be called as a scam. It is just normal in cryptocurrency and we cannot avoid it. Fortunately, there are still genuine here and I advise to you that selecting of a scam project is free so do not go for it.