Dropcard collections outside of Kickstarter

I am not doing drop cards as add-ons for the kickstarter. The shipping issues are difficult enough. I will likely wait until all dropcards have been claimed (they are one use codes) before removing the original ebooks associated with the dropcards and distributing the leftover cards with random giveaways / crossing out the codes. (Or distributing them with random letters I send out.)

The books are problematic enough with the kickstarter. Something had to give, and figuring out who can get let...