This glitch allows you to purchase any pack in the shop for the price of just a bronze pack! This is not a hack or cheat and it does;t require any third party program. All you need is some quick fingers!
First make sure to backup your data. This glitch does not always work even if you follow the steps. You can save your data to your WBID or through other means. If you save it through WBID, make sure to turn off your wifi before starting.
Step 1: Navigate to the pack section in the store. Keep your left thumb hovering over the bronze pack.
Step 2: Click the home button on your device
Step 3: Click back into the game (it helps if you do not have the app in a folder)
Step 4: Immediately when the game loads up click the bronze pack twice and then the pack that you wish to get for 8000 credits.
Step 5: If the option to purchase a bronze pack shows up, click confirm. If not, try the steps again.
Step 6: If you did everything correctly when you click confirm on the bronze pack it should open the pack that you wanted to buy. If this doesn't happen, you can restore your data and try again.