Ha... nooow they do it. I purchased Sketch version 2 for 50 euros when I lived in France. Then I moved to the US and got a new computer - at the same time version 3 came out. There was no way for me to get version 2 back: I tried the old "just re-purchase it and it'll end up costing you $0" (which worked for a bunch of other apps - but they were still on the same version). Instead I payed another $70 for version 3. I wrote to Apple and got my money back... but now I'm stuck with a dodgy version of 3 (that I'm supposed to delete and can't get updates for) and no way to get 2 back. Do I actually own version 2? I don't know!