Startups and VCs can contact Walk through Twitter or gmail (hunterwalk@gmail.com) in order to be added to the rapidly growing Google spreadsheet documenting participants. Those on the list include Spotify, Survey Monkey, and The Skimm… and that’s just the S’s. The effort, Walk explained in a Medium post this morning, is bipartisan: Walk’s past experience proves his commitment to the tech community’s political investment: In 2012, his app Picswitch helped users overlay an “I Voted” banner on their Twitter and Facebook profile pictures. The app proved popular enough that the Obama campaign officially picked it up, and it was used by Rihanna, Eva Longoria, and Barack Obama’s Twitter accounts. The goal is to ensure CEOs and founders will encourage, rather than simply allow, their employees to visit the voting booth. As Walk puts it: