Setup VPN on Cloud VMs for personal usage -> Generally ok, and you may need to stop it if police known it...
Share it with others -> Maybe ok if not too many people, and you need to stop it if police known it...
Sell it to others -> dangerous if you lived in China.
The GFW have the ability to detect VPN connections and you will got a connection reset...It’s more and more difficult to use blocked service/site in china.