A business can be busy because people trust it or because leaving is difficult.

Volume is ambiguous evidence. A full room can mean people keep choosing the place, or it can mean the alternatives are far away, the contract is long, or switching would cost a day nobody has. Both look identical from outside, and only one of them says anything about quality. Confusing the two is how a service can decline for years while its numbers hold.

If you run something, ask how easy you have made leaving and whether your numbers would survive that being easy. If you are the customer, notice which of your regular arrangements you would keep if changing took ten minutes.