Ayn Rand was clearly a subgenian, hence her lengthy paen to all things Slack, Atlas Shrugged. Even the title is a homage to the Church of the Subgenius, what else do you do in the face of the end of the world but shrug? And thereby do you gather much Slack.
In AS, the narrative relates that the best and brightest of the world have gone on strike, rebelling against government control and removing themselves from society, leaving it to descend into chaos. In doing so Rand clearly promotes the first, third and forth commandments of "Bob", to shun employment, to rebel against law and order, and to rid the world most of its population. Another recurring theme of the books is fear and conspiracy, the conspiring strikers, the coniving government, the use of FUD against "Reardon metal", and the fears of characters like James Taggart or Eddie Willers (who's afraid of calendars FFS); this is the fifth commandment to exploit fear. Weak characters are controlled by fear, strong characters put fear aside and instead make others fearful. Fear is exploited by Rand's heroes, and by Rand herself through the medium of dystopian fiction.
This leaves only the second commandment, to buy church merchandise. Why was this missing? Because it could only be too obvious to include?
No, it's not missing at all. The protagonists frequently buy from one another, e.g. Dagny places orders with Reardon, and eschew mass consumerism, John Galt - who is clearly Rand's avatar of "Bob" Dobbs - creates the free-energy motor discovered by the others, free energy being the apotheoisis of Slack. It's a closed shop, with purchasing power pointing directly to the top of the pyramid, to John "Bob" Galt. The strikers are the church, and the heroes all belong to it, buying each others merchandise, "church merchandise" by proxy. This is made even more explicit when the antagonists issue the directive against new products and inventions, the strikers' stock in trade. The conspiracy is outlawing the church's merchandise, striking directly at the church and effectively banning obedience to the second commandment.
Hence Rand's opus is revealed as an exhortation to Slack, to "Bob" and to the Church of the Subgenius.