Just when you thought you’d vomit if you heard one more person tell you about the latest happenings on his Twitter account (remember the good old days — when tweeting was reserved for pretty songbirds and not for your uninteresting coworkers?), an offer comes along that even the most out-Twittered technophobes among us can’t refuse: Vox Populi (755 Boylston Street, Boston, 617.424.8300), the hip Back Bay wine-and-dinery, is offering up a $50 gift certificate each Friday this summer for the lucky Twitterer who is the 12th person to tweet back to the restaurant’s account. Watch for the eatery’s posting on Fridays at twitter.com/voxpopuliboston, gauge a little wait time appropriately, and hope that you’re one person shy of a baker’s dozen to respond. It really is that simple. Bon appétit — or should we say bon chance?