To change the number of Boost Tokens to gift to a player, you will have to go to 'Boosts' > 'Gift Tokens' > 'Player x' and change the number of Boost Tokens to y. Now search for that value (type DWORD) and change it + research for the new value. Once you have found the right one, change it to whatever you want and gift it to 'Player x'. The selected player will receive the entered amount of Boost Tokens and you will end up with about the max possible amount of Boost Tokens that can be stored as a DWORD.
The only downside to this method is, that the gift boost tokens UI will be unusable for the remaining time of that specific contract, because the game thinks you have a negative amount of boost tokens and the UI can't handle that lol.
