Misuse of System Resources
2.17 DigitalOcean reserves the right to terminate services in the event Subscribers misuse system resources, including but not limited to employing programs that consume excessive network capacity, CPU cycles, or disk IO.
Newly updated it seems. They have already banned some accounts from browsing other forums on Google..
This is not new. Should one create several droplets that 100% max out resources non-stop, you will be warned and possibly banned as well, as this is and should indeed not be tolerated.