There are 'bargin' stores in my area, and higher end stores. The higher end stores have lots more bio stuff to buy, and other fancy goods, but also stock major brands of everything else.
Even though the product is the same, the pricing is 15% average more expensive for those common products. I suspect they get away with it, because you're already there, and I never see a full shopping cart there.
The also have baggers. The bargin store does not.
My point? The bargin store might shave even more off, with enough ads. And those people buying full carts?
Might be even happier with the savings.
I think as with many things, those struggling with money can't care one iota (not don't, but can't), and just do what saves the most, no matter the cost to society, or themselves.
Survival first. Rent first. Savings first.
Thinking more about the product, there's probably also a long-term vision wherein it becomes more useful than it is today. e.g. maybe it automatically handles tracking quantities and greys out the item photo when it's out (and alerts them to restock), shows prices in a more user-friendly way than regular shelves, makes promotions more prominent (but hopefully not too obnoxious), slightly reduces labor costs (by automatically updating prices), and allows various user interactivity such as clicking an item to see metadata like nutrition and ingredients. It's easy to make fun of something at an early stage when we're just seeing the tip of the iceberg, but 10 years from now this may become a repeat of the infamous Dropbox thread.
Rules of the Accurate Pricing Policy If the pricing error involves a product that costs $10 or less, the product is given to the customer free of charge.
If the pricing error involves a product that costs more than $10, the merchant must sell the item at the advertised price and give the consumer a $10 discount.
If the same pricing error occurs for identical products during the same transaction, the merchant must sell each product at the advertised price, but the $10 discount only applies to one product.
Mistaken updates, or hacking, could be quite costly. Maybe this risk is just perception, but...
Of course, I'm not thinking this ad-glass company is really playing a long game. They've just happened to move a piece earlier than most.
You're right that I wouldn't rage quit and leave without doing my shopping the first time I saw these, but I also might not be back. Sure, I'd learn to live with it if every grocery store were to get on board, but in that scenario not having them would become a major competitive advantage.