The bother with the other chips...
Let's say the player ends up with a total of 5 chips.
Chip #1 lands in $500
The $10,000 center slot then becomes $20,000.
If chip #2 lands in the $20,000, the player's total will jump from $500 up to $20,000.
In other words the center slot is a progressive jackpot. Each time the center spot is not hit, it grows by $10,000.
So using the same example above, if chip #3 lands in the center slot, that adds another $10,000 so the player would be up to $30,000 after 3 chips.
Chip 4 lands in $100 so now they have $30,100 after 4 chips.
The center slot for the last chip would be $20,000, meaning if the last chip lands in the center, the player's total would jump from $30,100 to $50,000. If the last chip landed in $1,000 for example, the player's final Plinko total would be $31,100.