Intel Xeon Phi- is it mining?

Thank you. I’ve been looking at hashrate distribution; and I’m boggled with seeing so many miners operating at over 4K sol…
One in particular running at over 700k
I was curious what was their secret weapon or is it just pure gpu power.
I assumed if the Xeon Phi was a heavy hitter… maybe.
Or not. I’m perplexed. It’s amazing the sheer power.