One Jackpot to rule 'em all!
Previously jackpot was split per currency and therefore refilled only from bets made in that currency and got credited in accordance with that currency Jackpot amount. This would of course put those who bet in a newly added currency or not a popular one at a disadvantage, as the jackpot there was simply small.
But not anymore!
The jackpot has been now aggregated in one and it will refill from bets made in all currencies. So no matter what currency you bet you will get a piece of that 5 BTC + Jackpot!