Reset the lottery or keep rolling?

Its a pretty good idea to keep rolling. You can stockpile lot's of gems and materials like bones and void dust, as well as a very good amount of exp cards, QP and friend points.

Better to keep rolling. It's a great way to get QP, items etc

I'm not sure. You definitely want to get the gold and silver apples, but after that there's no change in the boxes and it is an unlimited lottery. After the 5th box you have to clear the entire box before resetting so I don't know if it makes that much difference.

If this was a limited lottery, I would definitely empty it. Since it is unlimited, it really doesn't matter except for the apples. I will be resetting after jackpot and apples because I really want to level chibi santa with my giant pile of lancer ember and gems because I have terrible luck rolling on lancer banners and she is my second gold lancer after a whole year.

if you feel like you need the rest of what's in the box go ahead. Personally reset once i hit the prize if you want to reset i can personally attest to box 8 having buche noel in it! 24 hours and 5 golden apples and 12 silver apples later later i'm done farming!