I think the OP needs to outline the business model of Clef. How do you guys pay for all the servers and bandwidth? How do you guys pay for the technical and support staff?
https://getclef.com/pricing/I am familiar with this.
Free tier does not offer premium features but has no user or request cap. It is offered free for the basic usage, simply because the cost for requests is relatively small, (bandwidth/upkeep) Larger clients that need the extra assistance, support, and metrics, potential white glove service/customization and training can pay for this service.
I believe the business model is to allow companies to get on board, setup and use it easily and when they scale big enough that they may need additional resources from the company they can engage, and if not, they function as a brand ambassador.