Index: deploy/MULTI-INSTANCE.md
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--- deploy/MULTI-INSTANCE.md	(revision f43429431106c0c5b44ac4e91a6f294622a26fed)
+++ deploy/MULTI-INSTANCE.md	(revision 917b22a1f0e39aca9e2c40022bae9472e622a76b)
@@ -185,4 +185,10 @@
 Then remove its block from the web server config and reload it.
 
+## Hosting for other people
+
+Everything here is about the machine. The moment an instance belongs to someone
+who is not you, there is a second set of questions — what you are holding, what
+you owe them, and how they leave. See [HOSTING.md](HOSTING.md).
+
 ## Everyday commands