Cool project, but I'm afraid it can't always be reliably used. Whenever I'm travelling and using VPN services, the audio challenge option isn't available; I think something about VPNs increase the risk profile perhaps. Of course if you happen to be blind and using a VPN you're just out of luck I guess.
I'm using it with a VPN rn, it's working fine.
But yeah using a VPN/TOR increases the risk profile (or whatever they call it). It even slows down the animation of loading new images, it drives me crazy.
I'm trying it out right now. Works! I heard about people using Googles Speech-to-Text to solve the audio challenge some time ago... ty for showing this 1!