The first 1000 nodes receive 100% in the first 90 days. After the first 90 days, the APY will be the same for everyone during the current 90 day block.
The Smart Contract operates on a 90 day rewards block schedule. The rewards are broken down into a 90 day blocks over 270 days. After 270 days, the APY for everyone will remain unchanged.
For a detailed breakdown of the 90 day rewards schedule, please refer to the following link: