From now until June 8th, 2015 at 10AM PDT, Star Trek Online is having a 20% off sale on the services listed below. Now is the time to purchase these in the C-Store:

• Character Slots (4)
• Account Shared Bank Slots (10)
• Bank Slots (12)
• Bridge Officer Slots (2)
• Captain Rename Token
• Captain Retrain Token
• Character Slots (2)
• Duty Officer Roster Slots (100) (limit 4)
• Duty Officer Roster Slots (25)
• Inventory Slots (12)
• Outfit Slots (2)
• Ship Loadout Slots (10)
• Ship Slots (2)
• Energy Credit Cap Increase

Source: Star Trek Online Star Trek Online: 20% Services Sale