After investing so much of my time participating their surveys, then one day, I was informed that they have deactivated my account due to violation of the Terms of Use.
I was completely puzzled as I have participated the surveys with honesty & integrity. Many times, I inquired for clarification as to which Terms of Use have I broken. They would not answer my question and repeatedly dodged the question and provided the same boiler-plate response that the Terms of Use was violated.
It's sad that I have wasted so much of my time supporting their surveys and basically lost all my hard earned points due to their wrong accusations.