Here at Google, we always put the user first, and for the Developer Platform team, our developers are our users. We want to create the best development platform and provide the support you need to build world-changing apps, but we need to hear from you, our users, on a regular basis so we can see what’s working and what needs to change.

That's why we're launching our developer survey -- we want to hear about how you are using our APIs and platforms, and what your experience is using our developer products and services. We'll use your responses to identify how we can support you better in your development efforts.

The survey should only take 10 to 15 minutes of your time, and in addition to helping us improve our products, you can also help raise money to educate children around the globe. For every developer who completes the survey, we will donate $10 USD (up to a maximum amount of $20,000USD total) to your choice of one of these six education-focused organizations: Khan Academy, World Fund, Donors Choose, Girl Rising, Raspberry Pi, and Agastya.

find more details here:
http://googledevelopers..com/2014/09/tell-us-about-your-experience-building.html

Why the $10? Is it a gift....developing u know is not easy, you need lots of patches especially if ist not a nexus phn