Good ol cbafaq with the dime. It was an ETO so he could insert a payrise in the 5th year:
"Options can be included in any multiyear contract, but ETOs are allowed only with five-year contracts.
Options can be held by the player or the team, but ETOs are always held by the player (i.e., there's no such thing as a team Early Termination Option).
Option years may not have a lower salary than the previous season. ETOs have no such restriction.
A contract with a player option can be extended (see question number 59) when the option is not exercised. A contract with an ETO may not be extended if the ETO is exercised.
When determining the amount of a trade bonus (see question number 97), option years are not counted as part of the remaining value of the contract, but years following an ETO are counted"
Whatever happens, Blake will Terminate early and get 10 million dollar raise. Let's hope it's in green.