None, it you grind any mission too much the box drop rate slashes, huge. I used to grind ramboy, but after i do it a few times now, the boxes quit coming.
I am a noob, i just need to get my stuff to myth. So that is what I did. Now i log on praying to get a box out of anything.
So you dont grind missions anymore. You cant. But in games like this i have played in the past, when devs make huge sweeping changes like this, the cheaters come out in full force. Then folks get added to the cheater ranks since theyre pissed.
I am not the one to root my phone or download a bot as i am too old for that kind of thing, but many users are. Then devs instead of paying for or developing decent anti cheating measures, further restrict good users by trying to counteract bots by reducing quality and number of boxes recieved. Just like clash of clans. I quit that game for this one. I could either go back, or i could find another game. The should square things up.
All this in pursuit of getting people to buy tokens. Which, newsflash, people dont buy tokens, because whenever they spend them, we usually get hot garbage like gumiho torsos or legs. No wonder people dont buy them.