It's got 'scam' written all over it in big red text. Come, read about their innovative L2 chain in their well-hidden documentation: https://mixpay.me/blog/what-is-mixpay-why-mixpay/

I can smell these hustles from a mile away now. "We promise instant transactions of any kind as long as you use our off-chain currency as fiat!" - Yeah, I bet you do.