https://twitter.com/SDLerner/status/1145128910176378881
@MarkLundeberg   28/Jun/2019
' Very odd with the 300 s activation time there... my gut is telling me that satoshi was playing around with timestamps, and IIRC his block times are badly out of sync with the other miners...'

He also fingerprinted his timestamps.

https://bitslog.com/2020/06/22/a-new-mystery-in-patoshi-timestamps/
'This strange pattern is a new way to distinguish the Patoshi pattern from all other coinbase sets. We had three methods already (steep fast extranonce increment, reduced nonce LSB range, no timestamp reversals), and now we add a fourth (and in a next post I will show a fifth!). So why timestamp deltas are oddly distributed is a new unsolved mystery for our large collection. In my opinion, the existence of so many distinguishers is an indicator that Patoshi wanted his/her blocks to be identified.'

Identified for what?

We say: for the privatekeys of the early mined coins. But as of February 2021 we still don't have discovered how he implemented the privatekeys into the blockchain.