I think they're saying that businesses getting unsolicited offers from the LLM is similar to regular people getting unsolicited offers from businesses.
You can actually act on the advertisements and coupons, though. And the companies who sent those offers to you are obligated to abide by them. This potentially would be like if you got a BOGO coupon in the mail and when you tried to redeem it, they just pretended like it didn't exist.