No specific reason has been given but this normally happens if your answers did not meet the required quality. Reasons for reversal include, but are not limited to:
• Failed quality control/test questions;
• Answering the survey too quick;
• Duplicate completed survey found (e.g. same IP or device);
• Information given not matching your demographics;
• Giving untruthful or contradicting answers;
• Not giving detailed answers where required;
• Giving nonsense/bogus answers;
• It's clear that random answers or straight-lining occurred on multi checkbox questions.
just now i completed one survey of your survey after completion told u already did this survey n my 30 mints wasted n that too a big lie as i had not done that survey before