Hello!
I'm the author of mCaptcha. I'd be happy to answer any questions you might have :)
For context, mCaptcha was discussed in these threads in the past hour before being posted on here: [0]: https://news.ycombinator.com/item?id=32339922 [1]: https://news.ycombinator.com/item?id=32340424 [2]: https://news.ycombinator.com/item?id=32340305