Premium project organization collaborator seat

Does an organization member (org domain, in a non-premium team) who is added as a collaborator on a task within a premium team’s project at the organization count towards the number of seats in the premium team?

Related thread:

“If you simply add them as an assignee or collaborator of a task within a premium project they will NOT take up a seat but also won’t have access to premium features.” → it is not clear if this is true if the collaborator is an organization member.