You can learn more about Splintershards (SPS) here:
You can read the SPS White Paper here:
Information about SPS distribution can be found on the White Paper:
There are several different options including but not limited to Pancake Swap:
The snapshot occurs each day at roughly 12 PM Eastern (4 PM UTC).
No. You can only have one unstaking process ongoing at a time. If you want to unstake more, you need to either wait for the current unstaking process to complete. Or you can cancel the current unstaking and then start a new unstaking process
Yes. SPS is considered staked until the exact moment when it becomes unstaked. So if you unstake 100 SPS and will receive 25 SPS every 4 weeks, then you will receive staking rewards for each tranche of 25 SPS until the exact moment it becomes liquid SPS.