Each validation of a relay requires the same work done Therefore, the reward should be the same for work done on day 20 of the network and work done on day 23,475.
Some points to consider
• This will ensure the reward doesn’t become too small to be worth joining.
• Nodes will be incentivized to join at any point in the growth of the network.
• To ensure the market is not flooded with POKT tokens there will be burning mechanisms put in place.
Perhaps, including a way for the nodes’ stake to be more elastic will contribute to non-flooding of the market.