It looks profitable from looking at the screen prices but in reality is it not, in fact your always going to be at loss if you are thinking about running an arbitraging between OKX and Binance, i use two of these CEX and I've tried practically and it never worked.
So mathematically OKX and Binance arbitraging doesn't work. I don't know about other exchanges.
On the images, the Binance buy and sell P2P is the opposite of OKX. That would be losses.
It is about bitcoin transaction to other exchanges with cheaper fee. Not about arbitraging it on both Binance and OKX. Just using OKX in between to transfer to other exchanges for low fee.
I have not tried it before, but it is not about OKX at all. It is about Binance and Kucoin for example, but in a way you will first send to OKX from Binance using lightning network and send to Kucoin using on-chain.