Why installation and subscription leads shouldn't share one budget line
An installation is a single, larger transaction: the equipment, the labor, a job worth a meaningful one-time amount. A salt-delivery subscription lead converts into a customer paying roughly $10 to $20 a month indefinitely. Spending the same amount to acquire either type of lead makes sense for very different reasons, and blending them into one cost-per-lead figure obscures which side of the business the spend is actually working for.
A business running both offers should track acquisition cost against installation job value and against subscription lifetime value separately, the same way a septic company needs to separate pumping leads from installation leads, or a window cleaner needs to separate residential from commercial.
Why the subscription side changes the acceptable acquisition cost
A customer paying $15 a month for salt delivery is worth roughly $180 a year, and considerably more across several years if they stay subscribed, which is the norm for a service built around genuine convenience rather than a one-time purchase. That lifetime-value framing supports spending meaningfully more to acquire a subscription customer than the first month's revenue alone would justify.
The risk is applying installation-lead thinking to a subscription lead, treating it as a one-time transaction and underinvesting in acquiring it as a result, when the actual value only becomes clear once measured across the subscription's real duration. How that subscription is actually structured determines how much of that lifetime value materializes in practice.