The only somewhat compelling argument I’ve heard is that ads are usually sold by region (be they television, radio, or print) but many regions have multiple tax

The only somewhat compelling argument I’ve heard is that ads are usually sold by region (be they television, radio, or print) but many regions have multiple taxing jurisdictions where the rate can vary so how do you craft a regional price with these variations. And what do you do if one jurisdiction in the region has much higher or much lower taxes than other jurisdictions? I’m not entirely convinced that this is a very compelling argument but it is the one that at least seems reasonable.