Most service businesses that introduce subscriptions believe they’re upgrading their model. Suddenly they offer: One-time purchases (pay-per-use) Unlimited monthly memberships (recurring) A Good / Better / Best ladder (segmented value) Regular promotions (discounts, “first month free,” bundles, etc.) It feels modern. It looks scalable. It sounds like revenue optimization. In reality, this combination often produces margin chaos – not because any one lever is wrong, but b