Do people in the UK actually eat lollipops on those sticks?
I only ever see them with ice cream here.
Iced lollies, which I don't think are much of a thing in the US? Very prevalent here. Frozen fruit (or other) juice on a stick
You get a total of 1,275 Crafting Parts by completing all Challenges in the game. This, is ALMOST enough for you to craft 3 Star Cards from Rare to Epic (a cost of 480 Crafting Parts)
You get a total of 1,035 Crystals by completing all Challenges in the game. This is enough Crystals to get you just over 5 Trooper Crates.
Now that I think about it, TF2 has a prevention against the "elastic" solution though not necessarily the robot one, it forces you to acknowledge drops before you get more. And Valve publicly disclosed introduction of this, so it's weird EA didn't attempt something similar at launch.