The lesson
Announce a valuation with a short founder letter about customers' time saved, and list your shipped features as one running paragraph.
The title is "Ramp at $60B: The End of the Beginning", bylined to both co-founders. The letter begins "Seven years ago, Karim and I wrote our mission on a Post-it", states "85,000 businesses use Ramp to save over $1 billion a month" and links five product names, ending "Plus 476 more features. It's only October." An email box follows.
Don't copy the chapter metaphor or feature count unless yours is real. Keep the founders' names on it, the customer-side numbers, and an email box right under the letter.