Why did I disqualify at the end of my survey?

Surveys work in real time. If the amount of responses needed by the market research company is reached while you were in the survey you will receive a "closed" or "over quota" message at that point in the survey.

Another reason for disqualification might be that you answer questions too quickly, control questions were answered incorrectly or your answers didn’t match the information that you filled out in the profiles or surveys before.