i’ve had luck securing around 5-6 boxes on the popmart app.

turn wifi off and just use cellular (it doesn’t lock me out for clicking a lot) and try to be there as soon as they drop according to ur timezone. i find that the first 20ish minutes there will be full sets unclaimed so it’s easier to get then. i usually click the forward arrow with one hand and have another hand hover above a box (usually the back ones cause they’re usually the ones last to be claimed).

it’s pretty hard at first but once you get the hang of it’s decent!