I have an ad-blocker (and a network ad-blocker via the corporate network I'm connected to right now) but when I click on any one of the languages I can see a box labeled "ads via Carbon" to the right of the stdin box. So my guess would be that it's ad-supported for now.
Cool. This is quite usable and seems really handy—it's really fast compared to some heavier online repls. (definitely a use case for me)
How is it set up? I was definitely able to crash an instance I was in as well as read from root, but seemed all it took was a reload of the page and it snapped right back in without any real startup wait.
*edit: I just saw that you posted the source code as well. I'll definitely be exploring!
Seems like he spins up a container on each run, so 'root' is not really 'root'. I'd be worried though, containers are not secure enough to run untrusted code.
