Didn't realize Coef calculated it too, lol.
But yeh, jackpot needs to be at least: 1/((3439/10000)^12)*0.001*0.01 =
BTC3.65. If the JP is that amount, then making 0.001 bets is EV+

No problem. It is nice to see you calculating it too to cross check my number.

Thanks both for the calculation, it seemed much worse.
You are welcome. In fact, I was also a bit surprised about the ease to get a 7 in one roll (with 34% chance) when I first calculated it.