영구삭제 기능 첨나왔을 때 스팀기프트 서포터에 문의했었는데 삭제하면 규정위반이라고 하더군요

혹시나 해서 그때 받은 답변 붙여두겠습니다

According to the rules, all wins must be activated on the winner's account.
By marking the game as "Received" you acknowledged that you indeed received and activated the game you won to your Steam account. When we see the "Received" mark among your wins, we assume you've received the game, and if we don't find it on your account, you will get suspended for violating one of the basic site rules which I quoted below:

Won gifts should be activated to the Steam account used during registration, and they should not be regifted, traded, or sold.
Winners should correctly mark their gift as received or not received within one week of the giveaway closing.

저도 잘 모르지만, 제가 겪은 일을 일반화 시켜 생각한다면, 난리나죠.. 당첨된건 반드시 있어야 합니다. 안 그러면 스팀기프트가 신뢰성에서 타격을 입을테니까요.

나눔해주신 분한테 나눔받은 게임 이상의 포인트를 주는 게임키를 선물하고 해당 나눔을 삭제해달라고 부탁할수는 있겠네요.