"Minor" is in reference to the patch version, it's not an indicator of the amount of hours a maintenance for said patch should take. People meme about it a lot, but still.
@yinyangx A while ago Arwoo went into a livestream chat and asked a "hypothetical" question about removing sengoku/ghost ship badges, and considering all his previous hypotheticals came to fruition, along with Nexon's recent content-purge habits, people are understandably spooked and FUD spread like wildfire.
It does show an expiration date when you hover over the item in AH, but it'd really help if the clock icon was added onto temporary cash covers in AH though.