After a campaign ends successfully, we can keep collecting pledges through Kickstarter's Late Pledge feature. It works differently from pledging while the campaign is live:
Payment is charged immediately when you complete a Late Pledge, rather than when the campaign ends. Once submitted, a Late Pledge can't be modified or canceled through Kickstarter, so double-check your reward, add-ons, and shipping country before confirming — if something needs to change afterward, email us and we'll see what we can work out. Reward pricing may be higher than it was during the original campaign, since early pricing during a live campaign is often an introductory offer. SEPA isn't available as a payment method for Late Pledges, and Pledge Over Time isn't either, since the full amount is due right away. You'll get the same backer access as everyone else — updates, comments, all of it.
You can only pledge to a given campaign once: if you already backed while it was live, you can't also submit a Late Pledge or use one to change your original pledge. If your original pledge was dropped because payment couldn't be collected, Late Pledges is your way back in.