OpenAI’s chief revenue officer, Denise Dresser, sent a four-page memo to employees on Sunday about the company’s strategic direction, emphasizing the need to lock in users and grow its enterprise business. The memo, which was viewed by The Verge , repeatedly underlines the importance of building a moat around its AI products, to combat how easy it is for users to switch between whichever model is topping the charts on any given day or week. Dresser, who recently took over much of former COO