Final answer:
MasterClass can be categorized as a fully digital B2C e-commerce service, selling educational content directly to consumers.
Step-by-step explanation:
The platform MasterClass can be categorized as an e-commerce business that operates purely on a digital platform, offering services online to customers who are predominantly individual consumers interested in learning and personal development. Considering its level of digitalness, MasterClass qualifies as a form of B2C (business-to-consumer) digital content e-commerce service, as it sells educational content directly to the end users. The content includes recorded lectures and interactive sessions with experts in various fields. Because its business model involves no physical products and entirely digital transactions, it exemplifies a fully digitalized e-commerce platform.