It looks like Google is looking to pack the house at Google I/O 2016. They are sending out the last minute invites so folks within the mobile industry can attend the press and developer conference. Students wishing to attend will be able to pay the $300 discounted fee for the event, while everyone else must shell out $900. The Google I/O 2016 conference will be held May 18-20th.
Here's a link to the Google I/O 2016 mobile app: Google I/O 2016 - Android Apps on Google Play