Good points. I think soft cap and hard cap may be a bit more technical language, and finite / infinite less precise but intuitive.

I was actually refering to the block size being limited and scarce, creating a desire to get in a block, which is what bitcoin lets you prioritize

There are other models that could work too. A large space with a min fee. Fees as a % instead of flat, but then others could under cut you.

I'll think of other ways to phase this, probably a whole essay (or book!) could be written on this topic alone.

Thanks for the feedback.