Adding a paid AI subscription tier to Meta isn't just a new product — it's a new business model layer on top of one of the world's largest digital networks. I think of it like Amazon Prime: the subscription deepens engagement, reduces platform churn, and creates a revenue stream that isn't correlated with ad market cycles. As a long-term holder, this is exactly the business evolution I want to see. I'm not adding right after a 4% day, but I'll be watching subscriber figures closely over the next two quarters. This is a real signal.