4,000 eGold is distributed each week to all participants, proportional to the amount staked and time spent in the queue, up to 20% APR per participant.
*update: 5,000 eGold are being distributed weekly starting with December 1st – see the details here: https://elrond.com/blog/staking-phase-2/
The calculation and distribution occur each Monday. A snapshot is taken each Sunday at 23:59:59 UTC. Rewards are then calculated and distributed on Monday.
The calculation considers the previous 7 days. You need to be actively staking in the waiting list to be eligible for the rewards. If you withdraw before the rewards distribution, you will get 0 (zero) rewards for the 7 days in scope.