⬆️ Bump files with dotnet-file sync

Author: devlooped-bot

readme.md

@@ -18,6 +18,17 @@ Watch the [Orleans Virtual Meetup 7](https://www.youtube.com/watch?v=FKL-PS8Q9ac
 passing style with actors instead of the more common RPC style offered by Orleans.
 
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+## Open Source Maintenance Fee
+
+To ensure the long-term sustainability of this project, users of this package who generate 
+revenue must pay an [Open Source Maintenance Fee](https://opensourcemaintenancefee.org). 
+While the source code is freely available under the terms of the [License](license.txt), 
+this package and other aspects of the project require [adherence to the Maintenance Fee](osmfeula.txt).
+
+To pay the Maintenance Fee, [become a Sponsor](https://github.com/sponsors/devlooped) at the proper 
+OSMF tier. A single fee covers all of [Devlooped packages](https://www.nuget.org/profiles/Devlooped).
+
+<!-- https://github.com/devlooped/.github/raw/main/osmf.md -->
 
 <!-- #content -->
 ## Overview