[0x_rs]

> Just a challenge over and over.

It must be intentional. Not unlike the endless loop of frustratingly slow-fading reCAPTCHA challenges that don't go anywhere. The user gives up after some time, but doesn't see any explicit error or page blocking their access. I imagine it must be quite effective.

[waithuh]

in my opinion, the admins do not enable the option to ban lower trust users (or set the threshold high), so CF tries over and over again instead of doing that.