How about exchanging BCH to BTC from your exchanger and just scan their address and just wait for a few seconds to SELL your BCH to BTC?
That sounds like an extremely complicated time consuming solution to paying for something using btc. Especially when btc doesn’t even want you to pay for things using btc. #BCHPLS
Oh yes, especially if you are in a queue and people are waiting at the back from the line for their turn. I'm already seeing the picture now. Thanks :)