- On March 22, 2011, the redeem code function of the website was temporarily removed for maintenance and testing. Beginning May 16, 2011, the codes were able to use once again. For a week after the Redeem Code feature returned, it was possible for any player to redeem several Bubbleheads, Birthday Candle Hat, and Cryptid Backpack. The exploit was quickly fixed, but any players that redeemed the items were able to keep them.
- All item codes were expired at the time of OG closure in 2013, with the exception of only the Nano codes, Eye Guy Set, the Beetle Set, the Cyber Shogun Set, and the Clockwork Set.
- On August 5, 2019, code redemption was brought into Retro during Beta Patch 2.10. Instead of redeeming via the website as you did with the original game, there is now a Redeem Code button on the bottom of the player's inventory.
- On December 23, OpenFusion 1.3 was released, which made the Academy version fully playable. It also gave players access to most of these codes via use of the /redeem command. Some of the codes were disabled in OpenFusion due to the codes having no redemption limit at the time, and some of the items from them could be sold for taros, which allowed for infinite taro generation. This infinite code redemption was patched out in a later update to OpenFusion. The affected codes were put back in the game in another update down the line, which also implemented codes that were not initially included in OpenFusion.