The advertisement says “Thanks, Satoshi. We owe you one. Happy 10th birthday, Bitcoin!” and includes the hash of the Bitcoin block 554.509.
The first cryptocurrency was launched with the 2008/9 crisis in mind. This financial crisis affected individuals from all over the world and also financial institutions. In order to avoid this traditional financial world, Satoshi Nakamoto decided to create Bitcoin (BTC) something that was discussed in the past by cypherpunks and other crypto enthusiasts. No one knows exactly who Satoshi Nakamoto is.