Source only / source available / dual licensing and so on is a common model for web development components and libraries. Some from the top of my head are tailw

Source only / source available / dual licensing and so on is a common model for web development components and libraries. Some from the top of my head are tailwindui, mui, mapplic, flickity, many plugins for Wordpress and other plattform-like things and there are several additional CMS solutions, typically PHP based, that do this.