Is "Apply promotional shipping discount" scriptable?

I’m doing my annual “clean up the workflow and database” process, and one of the things I’ve been focused on this year is rationalizing my US shipping process.

From pure laziness, I confess over the last couple of years (since USPS First Class Parcel disappeared) I’ve been hard-coding the shipping details in each listing, or at least in the prototype listings I duplicate for a given kind of item. This seemed to be going OK, but in the spirit of maintainability I feel like I should go back and clean all this mess up: A few smart Shipping Policies, an update of the handling fees I set years ago on some listings, and so on.

Along the way, I discovered that I was not passing along the eBay discount on USPS Ground Advantage to the buyer, and that explains why my magazine sales have dropped since the rate hikes.

Anyway, I am cleaning that up now.

As I understand it, what I should do is go to my eBay Seller settings page and select either “eBay discount settings” or some fixed rate slightly lower than my seller discount settings. One location, it should apply to… well to what?

I notice that in the listings I have now, there is a checkbox labeled “Apply promotional shipping discount". Some of those are checked, others are not. I’d like to check them all.

But when I just now looked at the GarageSale AppleScript dictionary, I can’t seem to find that setting anywhere. Therefore:

  1. Should I bother? Or if I go ahead and set up the correct Shipping Policy categories and apply them on eBay, will this get overwritten? I will almost certainly try to be better about Policies soon, but not today.
  2. How do I script this toggle, if I should change it?

One quick question, which is difficult for me to check.

If I go to eBay and tell them to apply my [full] eBay shipping discount, as described above, does the GarageSale checkbox Apply promotional shipping discount even do anything? I ask because it feels like even listings where it is not checked have a reduced shipping charge after a while.

The problem testing it all is that it may take 24 hours to modify the eBay setting completely.

Does this checkbox actually have anything to do with applying shipping discounts from eBay? Is it only about applying user-defined discounts for multiple items in one shipment?

Well to be honest I’ve started using Shipping Policies, and restarted all my listings (because of a stupid cut-and-paste mistake, they all had to have the sizes adjusted) and… now I have absolutely no idea what that checkbox does.

Is it something grandfathered in from the old eBay API, maybe?

Honestly I had no idea that checkbox existed until your support question. I use Business Polices and I’ve enabled commercial rate shipping on eBay’s preferences. No idea what that checkbox does or used to do!