Promo Credits are awarded to backers of certain levels.
ADVENTURER - One Credit
RESIN ADVENTURER - One Credit
SKIRMISH - Two Credits
RESIN SKIRMISH - Two Credits
ONSLAUGHT - Four Credits
RESIN ONSLAUGHT - Four Credits
MASSACRE (and above) - Four Credits
You can trade your Promo Credits for Promo Miniatures - Big Skeet Feet, General Sir Eddard Sharp, Dagga Dixie, The Warped Warrior, Wukka-Wukka and Captain Grayhab - rather than paying for them as add-ons. The amount of Promo Credits displayed next to a Promo Miniature dictates how many Promo Credits you need to trade.
When the survey is sent out at the end of the campaign, there will be an option for you to select the Promo Miniatures you wish to trade your allocated Promo Credits for.
You CANNOT purchase extra Promo Credits as add-ons.
If you are backing at ONSLAUGHT, MASSACRE or higher, all additional Promo Models (as in those you don't use your Promo Credits on) cost half the standard Kickstarter price!
Just to clarify, these are the Promo Models, and their half-price cost:
Big Skeet Feet - £2
General Sir Eddard Sharp - £5
Dagga Dixie - £4
The Warped Warrior - £4
Wukka-Wukka - £2.50
Captain Grayhab - £3
This deal only effects these six Promo Models, and none of the other miniatures available.