Index: deploy/MULTI-INSTANCE.md
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--- deploy/MULTI-INSTANCE.md	(revision 12bed59eaefe12a4ed9c2c3cc267cb448ae42b43)
+++ deploy/MULTI-INSTANCE.md	(revision 952baf39d4219c186a0428025fb689aec377f7f5)
@@ -195,4 +195,10 @@
 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