My ideas for running a jackpot.

Funding the jackpot:
Dooglus adds 1k to a staking account and 100% of his stakes go to jackpot balance.
Players have the option to supply 1/2 of their invested stake to jackpot. Default to No. (Benefit for doing this below)
Players have the option to simply donate to the jackpot.
/Tip Last command includes jackpot always.

Determine winner:
Player rolls 99.9999 is solid. (If I was worried about you brute-forcing a winning seed and playing under a fake account to win, I wouldn't play at your site. I see that as a non-issue.)
When a player rolls 99.9999 a 'Congratulations' message can appear in chat and possibly a special color for the Bet Results tabs.
When a player rolls 99.9999 they are credited with (both daily and weekly) jackpot points equal to wagered amount, but no rewards are given yet.

Winner Payout:
Each day, 1% of the jackpot is split between all players with jackpot (daily) bonus points in proportion to their amount as a percentage of the sum of all qualifying points.
Daily jackpot bonus points are reset to 0.

Each week, 10% of the jackpot is split between all players with jackpot (week) bonus points in proportion to their amount as a percentage of the sum of all qualifying points.
Weekly jackpot bonus points are reset to 0.

(I think this will allow the jackpot to grow nicely.)

Incentive for player to donate 1/2 stakes:
Players that donate 1/2 their staked income get a x2 multiplier on jackpot points they earn. (Up to a maximum of amount invested)