These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
Data transferred between droplets on a private network is not charged. Note that currently the private networking feature will only work within a datacenter, not between them.
The developer cloud
Scale up as you grow — whether you're running one virtual machine or ten thousand.
From GPU-powered inference and Kubernetes to managed databases and storage, get everything you need to build, scale, and deploy intelligent applications.