The flaw in the analogy being that litter builds up additively. User data is more like a square law effect. You're completely right, of course. One user's data

The flaw in the analogy being that litter builds up additively. User data is more like a square law effect. You're completely right, of course. One user's data isn't worthless and should never be dismissed. Yet in financial and practical terms its value far closer to zero than to any useful unit of account.