Survey: 3 Respondents Required

11:48am - My email software, configured to check email every 5 minutes, receives the following:

United Airlines - As one of our best customers, your opinion is always appreciated.  Please click on the following link to visit our survey.

11:49am - With nothing better to do for the moment, I immediately click on the link.  And I get the following:

Thank you for trying to participate in our survey.  However, the survey has achieved its desired number of completions.  Thank you for participating!

I don't think any further commentary is necessary.  If you're going to use a survey to better understand the opinions of your customers, at least be serious about it.