People pay for convenience more than anything else.
Make some really nice installers and templates that will setup everything out-of-the-box in VSCode with clang, asan, intellisense, clangd, lldb etc. Make sure every method has good summary in code for intellisense to show. All configured and working with no extra steps on Linux, Win, Mac. With a nice splash on vscode to select the template to open. Some nice scripts to easily output mac, win, linux build installers. If you got it outputting android apk and iOS too with one click-build that'd be something significant. Also make claude skills for it. Call it RayLib DevKit. Put it up for $20. Or make available for $10 patreon subscription with special access to parts of your discord. Regularly update it.
The raylib project creator is part of the way there but honestly I've never had it work without struggle. Just now I tried using the 3D FPS template output for linux. Opening in vscode and clicking 'run' gives me some error. I imagine getting it all setup for lldb and asan etc would be many more steps. Same as getting it to package a nice installer for an app. You need to go through and iron out all the kinks on fresh systems so your average beginner afraid of code can click several buttons, compile, and be in example no issue, no complication. Select a different run profile and have run on debug, no issue. Have another profile to run asan. Make sure it all works with every nuance of every platform and check to automatically catch any issue and automatically install and config whatever is necessary. ( I'd also suggest making the windows one all msys2 based )
Also maybe get it all setup in one of those cloud dev platforms. Where you can login, have your clone of vscode and file browser. Have your compiled game running on the right. Code, compile, debug, iterate right there in the browser without downloading anything. Charge for extra features like CI integration or something.
I think raylib is at the point where more features will not cause as much growth as reducing the friction to use it.