I posted this over at https://game.giveawayoftheday.com/midnight-s-blessing-2/#comment-3359989 but I wanted to post here in case there a better chance of getting a reply.
What happened to me was that I went to the game page, completed my tasks and then I went elsewhere (steam) and I came back to post a comment about the game. I found that I was able to complete the daily tasks again even though the 24 hours haven't pass yet.
May I suggest that GOTD look at https://gleam.io/? That system has fraud detection built in so that all the fake entries can be weeded out. plus it also impossible to get more entries per day than intended thanks to it fraud detection system.
Thank you :)
By the way it not the first time it happened and I am sure that I did report it before though.