“Premium” is bought with real money.
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Becoming a Premium player gains you the following benefits:

  1. 50% more silver per match.
  2. 50% more experience points per match.
  3. 2X Upgrade Speed

You can buy these benefits for a limited period of time, after which you will need to purchase again to keep premium status.

  • £8.85 ($10.00) for 10 days premium status.
  • £13.28($15.00) for 30 days premium status.

(Premium is not to be confused with premium robots, which are bought with gold and do not need premium status to buy them.)