Why is that?

With this latest price surge, miners are making over 2% more mining Bitcoin Cash vs. mining Bitcoin.

That spread is likely to increase even further with the mining difficulty algorithm being adjusted downwards by about 50% in the coming days.

This weekend, block 479,808 is set to trigger a difficulty adjustment downwards by roughly 50%. That would mean that all things being equal, miners would make almost double mining Bitcoin Cash vs. mining Bitcoin.
"YES I'AM UNDERTAND NOW"