As someone who plays exclusively on mobile I can't hold shift. Some of those upgrade have thousands of buys! Also something that would be nice and may go hand in hand is a "just looking" option so I don't accidentally spend all my GQ when I wasn't sure what the price of it was.
#having a buy max button instead of holding shift to buy multiple in GQ and OCT shops
dusk lava
broken sandal
I've already implemented it 🙂 But it wasn't merged into the game yet 😉