link: http://buzz.blogger.com/2010/12/take-survey-win-blogger-shirt-be.html

Take a Survey, Win a Blogger shirt, Be Fashionable

Our ears are always open to your feedback, whether it's a request for a new feature you'd like to see, a suggested improvement to the latest release from Draft, or input during a usability study. In that spirit, we're hoping that you'll once again help us out us by taking a quick survey about our existing monetization features. And to make it a little more fun, we'll be sending out a handful of shiny new Blogger T-shirts to a lucky bunch of survey-filler-outers (chosen at random of course!). Thanks for the help in advance! And for those who don't win a shirt, keep an eye out for other ways to get your hands on one in the future.
 source: Blogger Buzz: Take a Survey, Win a Blogger shirt, Be Fashionable

NB:
but unfortunately, this survey was now closed.
when I tried to link survey :
taking a quick survey
was already closed :
It looks like the form "Blogger Monetization Features Survey" is turned off.
Try contacting the owner of the form if you think this is a mistake.