@4junk3000 AFIK it's 1 XP per $100 basic payout for both the Zirconia and KB Rig, just more XP per sell and replace cycle with the Rigs for eejits like me doing lots of 'em ?
( It's 1 XP per $10 for RTTs. That means it is not possible for me to spend enough fast enough to get away from having maxed out cash, but it is more sprinkles for your spend )
Anything over 1,400% while truck farming means the sprinkles cost less than the retries and the fastest way is take the first box you tap and move on. You can tap about 75 rounds in 5 minutes ( plus the place and sell time ) and should average 150 Ds with that. Go hunting 3 Ds and not only will it cost but it'll about double the time taken for only half as many extra Ds - 5 mins for 150 Ds versus 10 mins and $3.75 mil extra spend for 225 Ds !!
For the Zirconia break even is when you get 75 rounds for two of 'em, or 60 rounds for a single KB Rig, but it still takes twice as long for half as much extra if you do chase the jackpot.
If I'm earning, collecting tasks etc, I will retry for the 3 but if I'm farming it makes more sense to pick the same box all the time and just collect, averaging 2 Ds a pop over time.
A different way to look at that - if you go all out you can hit 900 boxes an hour. Take the first no matter what you get and average 2 Ds that's 1800 sprinkles. If you're chasing the 3 you average opening 2 boxes a time so 450 rounds collected in an hour for 3 Ds is only 1,350 sprinkles.
One word of warning, it's damn hard to hit that pace and almost impossible to keep it up for a long time, but I can tell you from experience it is possible to farm by hand and get that many.
