Of course, that's against the Microsoft licensing agreement. The VS Extension marketplace is only licensed for use with Visual Studio and Visual Studio Code (as are all of the good Microsoft extensions: Pylance, the Remote Pack, Codespaces, etc).
The top of the log file for the remote extension always says this:
"
*
* Visual Studio Code Server
*
* Reminder: You may only use this software with Visual Studio family products,
The top of the log file for the remote extension always says this:
"
*
* Visual Studio Code Server
*
* Reminder: You may only use this software with Visual Studio family products,
* as described in the license https://aka.ms/vscode-remote/license
*
"