If you don't use any services specific to the vendor. Then practice your backup and restore routines. You will be able to reasonably move to a new cloud provider, on the off chance you get similarly cancelled.

This is probably the most reasonable risk mitigation you can fairly easily do.

I don't think there exists a vendor that's going to be foolproof. Most users aren't going to any have issues with any of the major providers, including DO, Linode, Vultr, Oracle, AWS, Azure, etc...