This is an excerpt of Sources by Alex Heath, a newsletter about AI and the tech industry, syndicated just for The Verge subscribers once a week.The billboard didn't say "Listen Labs." It didn't say anything about hiring. It consisted of just a plain white background with "https://" and a single line of grouped numbers hanging over Nob Hill, San Francisco. Last month, Alfred Wahlforss, the startup's CEO, posted on X that whoever cracked the code and completed a subsequent challenge would win a trip to Berlin and get on the guest list for the ultra-exclusive nightclub Berghain.One of the more elaborate tech startup recruiting stunts in …Read the full story at The Verge.