Google wants to know if their free analytics tool encourages or allows you to spend more.
Have you ever been to https://survey.google.com?
As the sub-domain implies this is where Google collects user feedback and most people end up there by being part of a random test audience. I've been there a few times. I suspect it's a fluke! ;)
One of the current surveys is about Google Analytics. They're interested in responses to the new visualisation options and how useful people find it.
There were also a few questions fishing for spending traits. Here's a screen grab of one of the questions: