> the obvious strategy is just offer $1 until you reach the price floor.

Fair enough, but...

> dumb...pointless...

Really? Did you read the question "how likely are you to remember this shop?" below the experiment? Because I totally would remember this and am much more likely to return at a later time.

> Because I totally would remember this and am much more likely to return at a later time.

i would totally remember what a waste of my time it was, so yes in that sense you are right.

a strategy that won't get you the floor price ...