I have been participating in almost every survey for half of the year and accumulated around £40 worth points. Then, one day I received an email that they deactivated my account, that it will not be possible to re-activate it and I cannot now redeem any vouchers. They told that my 'member profile is no longer suitable for our market research needs', whatever that means. Moreover, when your profile does not qualify for a survey, they usually just say that, so I do not see why deactivation was necessary. They keep replying me in the same generic email regardless of what I ask them.