Looking at that chart, it says that you require 1 VMware Standard license per physical processor that your host has. Moving down the chart to the vCPU, that says that a VM may have at most 8 vCPUs (for Standard). That is not 8 vCPUs per license, that's 8 vCPUs total.
The demo version is an Enterprise Plus license, and thus expands to 32 vCPU on a VM.