1. It's more work to do than a normal resume since it's project-centric. Also unless you're constantly tracking this, does everyone remember all the libraries they're using? Probably not (There's still a lot of work needed on the UX front. It's not very optimized for mobile)
2. People have to start using it. (I have never marketed my IMDB for everything well enough) See #1
If you scroll down, you'll see some of the tools (I assumed) he used.
If you go to one of his projects (Twitch), you can see what he used for it: https://theymadethat.com/projects/7da659d8-629f-5c10-9160-7a...
That in turn should show up in the main product profile, which results in credit being given like IMDB
https://theymadethat.com/things/wz7/twitchtv/show_built_with...
The problems are two fold:
1. It's more work to do than a normal resume since it's project-centric. Also unless you're constantly tracking this, does everyone remember all the libraries they're using? Probably not (There's still a lot of work needed on the UX front. It's not very optimized for mobile)
2. People have to start using it. (I have never marketed my IMDB for everything well enough) See #1