Essence Credits are the single unit that prices AI Tutor sessions, syllabus generation, lecture and avatar-video generation, while also being the currency tutors are paid in and referrers are rewarded with. VR mode and BCI focus sessions are free on every plan, not credit-metered. This piece walks through how a credit moves through the system — from a $5 Starter pack purchase to a spent AI Tutor session — and why the underlying unit economics still need validating against real compute cost (see Zenith).