1) That customer better have great verbatim memory, because verbiage matters.
Ok. So if I'm understanding you, being explicit is important. This I'm not sure matters when the actions and the outcomes are the same. Let's say you have one customer who was told to buy x and they'll get a bag. The outcome is that the customer spends on the goods, and walks out with a bag. Then you have another customer who was told by their SA they need to "be a loyal customer and get to know the brand," so they buy a bunch of other objects. The outcome, even without the verbalization, is the same as the first customer: they spend on the goods, and walk out with a bag. Why, then, do the disparate experiences matter if the result of all of them points to a same outcome for both consumer and corporation? Both customers know to buy more if they want a bag. Hermes SAs know customers need to buy things for their bag nominations to get approved. Do the means have to be identical every time if the end result (arguably, tying) is what transpires?
Without it, it is just a customer's understanding. If an SA said it would definitely improve their chances, that's not the same. 2) No number of customers with similar stories would convince me as long as there are customers with different stories. You would need to prove a direct correlation of $ spent to price of Birkin, with ratios matching across the spectrum of customers. If each "journey" is different, that means all their experiences are different. That's not really a sign of tying.
And what you're also saying here, correct me if I'm wrong, is that as long as there is no set rule about the exact dollar amount, it is permissible to refer to spend as improving one's probability ("definitely improve").
Can't probabilities form into generally understood rules, assumptions, and standards, though? For example, if there's a less than 1% chance of dying in a plane crash, the repeated events of flying successfully deem planes as safe to fly. If a weedkiller reduces infestation by 2/3rds, it's deemed as a good product. These are all just technically patterns. Yet products are certified and regulated all the time based on these single data points that when taken as a whole, formulate a trend. I think it can be argued that when the experiences of Hermes customers are taken as a whole, it reveals the overarching trend of "spend money get bag."
Not to mention that SA could have violated policy for the commission. That still isn't coercion, because the customer chose to purchase the bracelet.
From my understanding, coercion as a legal definition means requiring the consumer to buy one product as a condition for buying another. Choosing to buy the product, even voluntarily, can still be coercion if it's a requirement to buy another item. But I'm happy to be corrected if my understanding of the law is wrong here.
3) Best customer status probably includes those that spend ridiculous amounts without batting an eye
So we agree that spending is at the heart of being deemed a "good" customer. Why do you perceive it as acceptable corporate practice to instruct customers to "be loyal" (ie, spend), but you denounce the company for explicitly instruct customers to spend to obtain a bag? To be clear I know that legally there's all the difference in the world, specifically from an evidentiary standpoint. But a racist who uses dogwhistles isn't any less racist because they use codewords. Hermes (which I'm not saying is as bad as a racist, y'all, don't come for me) is not any less mercenary for using terms like "be loyal to the brand" when they're still saying "spend more." And arguably, if I can point to enough times that they've explicitly instructed customers to prespend, it shows an increased probability that their corporate buzz words are a more genteel way of instructing the same thing as what they're outright banned from saying.