With one product change, Twitter risks devaluing its biggest status symbol, driving away celebrities, and reducing overall trust in its platform. Maybe they can learn a lesson from video games. — Author’s note: Thanks to Stephan for being a sounding board on this article. Celebrities are Twitter’s single most valuable resource. No one cares what knicksfan2123 has to say but lots of people are curious about what Snoop Dogg and Selena Gomez are up to. …