Mention publicly hosted services for Cinny, Element and synapse-admin

docs/configuring-playbook-client-cinny.md

@@ -2,7 +2,12 @@
 
 This playbook can install the [Cinny](https://github.com/ajbura/cinny) Matrix web client for you.
 
-Cinny is a web client focusing primarily on simple, elegant and secure interface. It can be installed alongside or instead of Element Web.
+Cinny is a web client focusing primarily on simple, elegant and secure interface. It can be installed alongside or instead of [Element Web](./configuring-playbook-client-element-web.md).
+
+💡 **Note**: the latest version of Cinny is also available on the web, hosted by 3rd parties. If you trust giving your credentials to the following 3rd party Single Page Applications, you can consider using it from there and avoiding the (small) overhead of self-hosting:
+
+- [app.cinny.in](https://app.cinny.in), hosted by the [Cinny](https://cinny.in/) developers
+
 
 ## Adjusting the playbook configuration
 

docs/configuring-playbook-client-element-web.md

@@ -2,6 +2,11 @@
 
 By default, this playbook installs the [Element Web](https://github.com/element-hq/element-web) Matrix client for you. If that's okay, you can skip this document.
 
+💡 **Note**: the latest version of Element Web is also available on the web, hosted by 3rd parties. If you trust giving your credentials to the following 3rd party Single Page Applications, you can consider using it from there and avoiding the (small) overhead of self-hosting (by [disabling Element Web](#disabling-element-web)):
+
+- [app.element.io](https://app.element.io/), hosted by [Element](https://element.io/)
+- [app.etke.cc](https://app.etke.cc/), hosted by [etke.cc](https://etke.cc/)
+
 
 ## Disabling Element Web
 

docs/configuring-playbook-synapse-admin.md

@@ -4,7 +4,7 @@ The playbook can install and configure [etkecc/synapse-admin](https://github.com
 
 synapse-admin is a web UI tool you can use to **administrate users, rooms, media, etc. on your Matrix server**. It's designed to work with the Synapse homeserver implementation and WON'T work with Dendrite because [Dendrite Admin API](https://matrix-org.github.io/dendrite/administration/adminapi) differs from [Synapse Admin API](https://element-hq.github.io/synapse/latest/usage/administration/admin_api/).
 
-See the project's [documentation](https://github.com/etkecc/synapse-admin) to learn what it does and why it might be useful to you.
+💡 **Note**: the latest version of synapse-admin is hosted by [etke.cc](https://etke.cc/) at [admin.etke.cc](https://admin.etke.cc/). If you only need this service occasionally and trust giving your admin credentials to a 3rd party Single Page Application, you can consider using it from there and avoiding the (small) overhead of self-hosting.
 
 
 ## Adjusting the playbook configuration