There are a lot of potential abuses, but it shouldn't be an obstacle to the awesomeness of the idea.
Since a primal may be a "joker" to win a fight, imposing heavy restrictions on its use shouldn't be a problem, like :
- a company can have only one "card" at a time
- the card is automatically lost after X time
- a company must wait X time after the card has been lost/used to be eligible to get a new card
- others
And that's only the most obvious ones.