One black-and-white image a day, posted simultaneously to Twitter and Instagram, distilling a single idea about leverage, value, or independent thinking.

“one black-and-white image distilling an idea about leverage, value, or independent thinking”

Jack has framed the daily content itself as the trust-building mechanism: publicly and repeatedly proving he could produce a useful result is what made people willing to buy from him later.

“Continually proving your ability to generate a result is what builds trust with your audience, and drives sales of your products and services.”

Jack opened pre-orders the same day he floated the idea, then built and shipped the course over roughly the following week, tweeting progress daily; the finished course released with 441 sales and $43,659 in revenue.

“Design Fundamentals just released 441 sales $43,659”

The course topic itself came from an outside signal: David Perell had publicly asked to learn Jack's design approach and tagged him, which Jack has credited directly as the spark for the course.

“h/t @david_perell for inspiring this”

Jack ran a giveaway of his own (zero marginal cost) digital products in exchange for people subscribing, rather than a cash prize.

“gave away $70,000~ of product (that I pay nothing to deliver)”

Jack has stated directly that sales tracked active, ongoing promotion, not audience size or product quality; once he stopped actively talking about a product, sales for it stopped too.

“When you stop promoting, you stop selling.”