The recent quality shift to Blood Trials items made them all unable to be gifted, it'd make sense to make them giftable again as grade tiers are a convenient way to tell an item's rarity for trading. Some people enjoyed exchanging these items through the event, as well as a bit after its end, and it'd also give people who just missed the event a chance to get the items if they can find someone who's willing to sell/gift them. Items that couldn't be gifted before still shouldn't be able to be giftable after this change if it happens, as they already have a separate "this item cannot be gifted" tag anyway.