> The problem with this IMO is that some enterprising person will just use regular tailwind (or another utility-css framework like tachyons) and re-implement all of these components and give it out for free, circumventing the license and killing the value of this.

No because I believe that for every enterprising person wanting to circumvent paying for software, there are that many people who want to support the entrepreneurial spirit Adam and company show, and pay for good work. That's what capitalism is suppose to be about at least, anyways.