Are you limited to only receiving burn cards as challenge rewards, or is there someway to get them for just scoring? What happens when you run out of challenges?
You get burn cards everytime when:
- every 5 levels you get a pack of rares
- after every match you get one
you also receive cards randomly as you do pretty much anything in the game:
- kill grunts
- kill spectres
- kill titans
- kill pilots
- destroy drop ship
- cancel other player's cards
You will see "burn card earned [task]" (example "burn card earned grunt" for killing some grunts) in red/orange in your xp feed when you collect a new card.
The cards you get from challenges are more related to the challenge itself (Gun challenges will give you amped versions of that gun), while gameplay cards are completely random.