PayPal sent out an email a couple of days ago outlining upcoming changes to the user agreement, none of which were GST-related (from what I can gather, the updates are related to payment funding sources, I'm not 100% sure but it looks like you might be able to nominate a source other than a PayPal balance in order to pay for something online. They are also updating what qualifies as SNAD on pick up items, and used items that were inspected / picked up by buyers can not be claimed SNAD).
Interestingly, the other "E" site has made no announcements about GST on their fees. I wonder if they will, or whether the fact that they don't have a dedicated Aus site makes a difference? 
The questions i have now is what with happen in cases where ebay invoices for fees on items that aren't actually paid for (which happens all the time), and those items then go to UPI or the order cancelled, as well as if items are returned later.
They also sometimes run promos where they charge fees, but reimburse them a month or two later, so I really hope they provide a more detailed info page or something soon. I don't like not knowing exactly how things are gunna work. 
Good points Digi.
If things work as they should, when/if you get any sort of a refund you should also get the GST refunded no matter when the transaction occurred.
I would definitely not like to be the staff member who has to process all those refunds for UPIs and promotions.
I only have limited experience of the paperwork involved in refunds including GST but it is a hassle. It is easier to send it to the accountant that month.
I always overestimate our wages for Workers Compensation so we get a refund each year. Last year they did not actually refund but deducted the refund amount off the next payment. I hope they do the same this year so I don't have to do the GST adjustment.
