That's an excellent question. The free part of MistralCSS is enough for 90% of the users, I guess, and that's cool!
But the Premium is a little bit different. It's a long term support app with new components and blocks coming every weeks / months (130 components for the Launch Day)
Do you plan to release components tailored for admin dashboards and SaaS webapps? I noticed most of the free component are better suited at "commercial" websites
Cool! I just bought it, both because I like it and I would like to support a fellow indie hacker :) I really look forward to more "application ui" components as they call them in Tailwind UI, keep up the good work!