Have you heard of 996? It’s the demanding work schedule that calls for working 9 a.m. to 9 p.m. six days a week. Apparently, it’s the new thing in the San Francisco tech scene, and it’s all anyone can talk about (search Twitter).So far, this has been a story based on vibes, not data. But I looked at Ramp transaction data and found 996 is real. San Francisco-based employees are increasingly working on Saturdays, and it’s already showing up in spend trends.The chart above uses Ramp corporate card ...