Sometimes though you could be subjected to an endless loop of cloudflare checks, especially if your IP address is marked bad or if you're using a VPN.
It's just a nonsensical way of telling you that "you're not welcome here, please go away" on the side of the website owners (most of whom have no idea that this is happening since this is all handled by cloudflare).
Sometimes when I use Mixtum through certain VPNs, I have to wait for Mixtum verification or even complete Captchas multiple times. Instead of turning off the VPN, I switch to a different one, and usually, this solves the problem quickly.
I think Mixtum has a feature to detect unusual user IPs, like those from heavily used free VPNs. If users have full trust in Mixtum, they could turn off their VPNs for a smoother and more convenient experience.