@KathinJax: Thanks! That's what I was after

@MeLike2Travel: I've not had an invitation to install the notify program, but I often get the survey expired messages. Sometimes when I've got my inbox open I see an email arrive with an invitation for a survey and click on it straight away and it has already expired. Have contacted their support who were utterly clueless. Any ideas what causes this? Is it perhaps a dead link that they erroneously send out?