Kickstarter is an all or nothing platform. The project must reach its funding goal by the time the campaign ends in order for Kickstarter to deem it a success. Therefore, these two things have to happen, in this order, before your credit card is charged.
1) The campaign reaches 100% or more of its funding
2) The campaign ends.
The coin is "minted" (3D printed) in 420 Stainless Steel Infused Bronze (60% Steel / 40% Bronze) Polished Bronze Steel. It is the size of a U.S. Eisenhower Silver Dollar (1.496 x 0.107 inches).
Now that you know that little detail - you can change your pledge and grab one of these beautiful Kickstarter Only pieces of memorabilia at the $80 Tier (or any of the other higher tiers).
The crossover coin is "minted" (3D printed) in nylon plastic - it is a Kickstarter Only piece of memorabilia that can only be obtained by backing both Rancidville and Sunmaker at the physical tier levels.
Don't see the answer to your question? Ask the project creator directly.