"public property" may not be the correct metaphor. But neither is "shop front" correct.

Taking the store metaphor further, it would be more like you knocking on the front door of a clothing store and the store owners open the door and throw every possible piece of clothing at you, shirts, shorts, underwear, including coupons to "partner" stores, when all you wanted was a pair of pants.

Upon knocking, if the store owner hands you instructions on how to enter their store and interact with their products in a personalized shopping experience, that would be one thing. But when the clothing owner throws everything at you at once, what they flung at you is for all practical purposes public property.