As long as you do separate Orders that add up to at least 24$ you should be golden. (For Saver)Otherwise it will just give you all the cheapest games 50% off. (For example I added $642.57 worth of games to my cart, and after CAG16,B1G50 and PUR it was only $456.78 ) (i'm gonna do a separate tally to see what it ends up being with separate transactions. Not through buying but adding games to the cart, getting the total, writing each total down and then adding them all up)
And of course if you don't mind taking a chance that you will likely end up with a POS.