Docs about the "Photoshop API" (trial) quota/units and pricing?

The “learn more” link in the developer console for the quota/units doesn’t work and I can’t find any info about how a “unit” is counted.

Can someone please provide any info about that? I suspect it’s based on CPU time since it doesn’t match the number of API calls, but I have no idea.

Also, who can I get in touch with for what the plan for pricing of the Photoshop API will be when it’s released?

Another idea: it would be nice if the API response to the “job status” endpoint included how many “units” were consumed when it knows.