Who pays for renewals after I hand a tour over?

The client, who owns the tour and its Vault. When you made the offer you chose under Who pays for the hosting? who pays for the first term: the client chooses and pays for a Vault, or you pay (I pay), and the Vault you bought for a set time goes with the tour (a Vault that renews by itself is billed to your card and cannot go). In both cases the Vault that hosts the tour is the client's afterwards, and only the client can extend it.

A Vault of yours that hosted the tour stays on your account, empty, when the tour goes (unless you chose I pay). If it renews by itself it keeps billing your card until you stop it with Stop renewing on its page; one you paid for once runs to the end of its term (How do I stop a Vault renewing?).

If you left Keep telling me when its hosting is about to end ticked (it is ticked to begin with), you are told when the Vault is about to end or has ended, as the client is, but not about what the client pays or does.