What you receive
Core builds a matched deployment set for a supported SourcePawn project. The distributable package contains the plugin/runtime files and public configuration needed for that protected build; the protected implementation is not shipped as ordinary readable SourcePawn logic inside the deployment.
How activation works
Install the protected release, approve that server from the purchasing account, and consume one of the seats included with the product. If the machine changes, retire the old installation before approving the replacement.
Compatibility is release-specific
The current Protector checkpoint is SourceMod/SourcePawn-first. The live release page and service capabilities decide which source-package format, platform and runtime are accepted; planned formats are not advertised as supported until a real backend can build them.