I am also aware of several Vancouver businesses (some of which are technically in other cities like Delta) that would also strongly oppose Point Roberts being ceded. It makes it easy to offer non-international shipping to US customers, by way of driving into it, dealing with customs in person (which can be less headache then the customs broker services offered by post or parcel services), and then finally sending from the post office, or one of the couriers in the US itself.

The same system can also be used in reverse, for people who live nearby. This is especially useful for buying things from company that won't ship internationally at all, or who charge excessive fees for shipping internationally.