Does an Inert foe still spend or raise Threat when its card calls for it?

Question

Accepted Answer

Yes. Inert stops the foe from moving or attacking, but not from its Threat cost or its Threat increase. A boss that activates at 0 Threat still adds its Threat, and a mob that cannot move or attack still spends its Threat.

Arydia: The Paths We Dare Tread

Does an Inert foe still spend or raise Threat when its card calls for it?