Where the pool comes from
Each jackpot-eligible Yono VIP slot tile contributes a fraction of every spin to the pool. The share is set by the studio and is published on the tile before the player funds the spin.
When the pool resets
The pool resets when a player wins the jackpot. The reset happens at the moment of payout, and the the pool value updates on the next snapshot.
What the figure does not mean
The figure is not a forecast. The pool can grow between snapshots, and the next reset value depends on the actual jackpot hit, not on the current snapshot.