Clarification Needed on Terms of Service Section 5.d

Could you please provide clarification on the interpretation of section 5.d in the terms of service, which states, "use the software for commercial, non-profit, or revenue-generating activities"? Could you illustrate this with examples? For instance, would developing a custom lesson for a school in exchange for payment be considered a violation of this provision? Additionally, is creating a custom behavior pack and selling it also within the scope of this clause? I seek a better understanding of the permissible use cases under this section.

Thanks!