American households spend about $1.1 billion a year on AI subscriptions. Big tech spends that much building AI data centers every 14 hours. The household number comes from PNC's card data. 2.2% of US homes pay for AI, roughly 3 million of them, averaging $31 a month. More than twice as many households pay for sports betting apps. Now run the bull case all the way out. Streaming took two decades to reach 43% of households. Hand AI that same endgame at today's $31 average and the entire US…