awesome insight. i've heard this referred to as the "site merchandising" problem. There are some products that are there to attract people / give them a choice, but they don't sell themselves.
Cafes use it too. E.g. a corner coffee shop may stock pastries that nobody buys. When people walk in "wow look at all their pastries!" And they feel good and become regulars.
I heard plasma tvs did exactly that for beard trimmers or whatever.
Reminiscent of halo cars in the automotive industry. Fancy flagship vehicles produced to show off the brand and bring attention (to their other vehicles), but not necessarily to become profit makers themselves.