It appeared yesterday in Manage My Store, had a bunch of T&Cs to accept, but there seems to be a relatively diverse range of options for offering discounts, eg $ or % discounts for a certain spend, or number of items in order, and while no customer-exclusive coupon code generator type thing (which I would have loved), you can create a semi-exclusive offer, via a link that activates the promo (eg if you have a website, or send out an email to select people, the offer is activated for them if they click on the unique link). 

The T&Cs mentioned immediate payment is required for items to be eligible which puts a bit of a spanner in the works for me if that remains - theoretically, immediate payment should be fine on my items.... If eBay, the cart and the app worked like it should. But alas, since they often don't, I can see it increasing the number of times people checkout multiple items individually, and that already happens almost daily (promos might help increase people using the cart, but).

Anyway, thus far I've just had a quick squiz at the kind of promos you can create, just thought I'd put it out there plus see if anyone has any other experience with it, hints, tips, found glitches, etc. 🙂