Most skills marketplaces are basically a nice list of links to GitHub repos. You still have to clone things and edit config files to actually use a skill, which loses anyone who isn't an engineer.
Claudinho is all about the UX. Browsing feels like an app store, and installing is a couple of clicks instead of setup steps. It's built for non-technical people first, the ones who'd benefit most from skills but usually bounce off the install process. If you can add an app, you can add a skill.