I think the one-cent spread on Coinbase Pro mentioned in that article is partly just an artifact of their fee structure. Maker orders which are placed and sit o

I think the one-cent spread on Coinbase Pro mentioned in that article is partly just an artifact of their fee structure. Maker orders which are placed and sit on the order book have no fee, whereas orders which match against the order book are charged a fee. So unless people are desperate to trade, they often save on fees by place a post-only order at 1 cent away from the other side of the orderbook. You can often see this as a pair of walls 1 cent apart on either side of the orderbook.