If you make a puzzle, but nobody enters the main giveaway....

no one receives a gift.

it'll say on your account but there will be no winner

The giveaway will end like normal but there won't be a winner. I think it still shows in your giveaways list. It won't count against you like a deleted giveaway though

You don't get CV for it either...

Check my profile. There are a few closed puzzle giveaways that nobody entered ;__;

;_;