I was just on ebay looking at a few Vita games. When I noticed when I was looking at one half way down the page it says get this for £5 (the game was £10). I hovered my mouse cursor over the My ebay tab at the top of the page and at the bottom of the drop down box it says you have a £5 coupon to spend.
Clicked on it and it revealed a code to enter at the checkout. Bought a game for £13 entered the voucher code and got it for £8. Not sure why I got this voucher. But am not complaining. The voucher I got said it expires at the end of this month (31st).
Not sure if everyone got one. But you may as well check just in case.