Rewards programs are opt-in. Stores have even stopped harassing me to sign up.
Analytics are the equivalent of a computer following you around the store, watching what you look at, how long you look at it, what you pick up, what you pull out of your cart and put back...
I’ve never in my life gotten message from the grocery store saying, “Hey, we saw you were looking at grapefruit. Here are some other citrus fruits we think you might like.”
I’ve never in my life had a store send me a message offering to sell me all the items I abandon in my cart on my last trip.
There is certainly data brick and mortar are looking at and it is often intrusive and creepy. Still, they weren’t doing this a few decades ago and they were fine. They’re pointing at online stores and saying “But it’s the only way we can survive!” It’s almost bizarre to point back at the more expensive, often first-party controlled, less accurate solutions of brick and mortars and say, “But they’re doing it too!”
(This problem is compounded when this data is given freely to a third party who now has much more data than even the individual stores or websites.)
All this adds no benefit to me as a customer. Lower prices are not a benefit if I’m also being psychologically influenced to spend those savings and more on something else.
Online or offline, I don’t care. Stop doing it. It’s creepy and unethical. It’s a waste of resources that could go towards giving me better products or a better experience. It’s the equivalent of cops asking for back doors in encryption schemes because it makes their jobs easier. If businesses can’t find a way to stop doing it themselves than I think maybe we need some regulation.