Add a possible categorization distinction

notes.md

@@ -50,6 +50,18 @@ need followup.
   - https://www.hashicorp.com/license-faq#Why-is-HashiCorp-making-this-change
   - https://www.hashicorp.com/blog/hashicorp-adopts-business-source-license
 
+# Categorization question
+
+Is there a distinction to be made between these cases?
+
+* licenses that are not open source licenses but that state (in the license
+  text somewhere) that they automatically convert / automatically permit use
+  and redistribution subject to a specified open source license after a period
+  of time
+* publicly announced practices of manually relicensing old codebase snapshots
+  on a particular schedule, which depend on a person at the company explicitly
+  making a delayed open source release
+
 # Sources / Acknowledgements
 
 * Simon Phipps