From the campaign:
We just passed our $15,000 goal and Wayne Duke is now unlocked!
Lower level pledges now have more options for bonus figures to choose from, but if you pledge at the Gunslinger level ($100) or higher, you get ALL unlocked bonus items free! Right now that's a total of 9 figures and 6 Colt 45 dice.
Next up, the Tranquility Crew will unlock at $20,000!