While  The Devil Wears Prada 2 opening this weekend will no doubt be fashion’s top drama at the box office , Monday night’s Met Ball will have plenty of its own. Sure, its theme “Fashion Is Art” is true — but lest we forget, it’s also commerce. This Monday’s Met Gala — “fashion’s biggest night of the year,” as the cliché goes — will deliver beaucoup theatrical looks, with Beyoncé, Nicole Kidman, Venus Williams and of course Vogue’s Anna Wintour as co-chairs, and a host committee that includes Saint Laurent’s Anthony Vaccarello, Doja Cat, Elizabeth Debicki, Teyana Taylor, Lena Dunham and Zoë Kravitz. But the intrigue off the red carpet runs just as hot, with billionaires Jeff Bezos and Lauren Sánchez Bezos as co-chairs and Amazon as lead sponsor. That’s the commerce part. The Bezos pair are being accused online of “buying their way into culture.”  Whatever works  is no doubt their sentiment. The first question: will Amazon’s involvement drive celebrities away?…