I don't know Marian. I didn't realize it was a one day special discount so thought there might be something else today. Since I don't work today, it just seemed like a good idea to wait.
I did notice though that they changed the discount on the Edith Finch game earlier than what they showed in their original release post also, so maybe something weird is going on. When they changed that, I believe it actually showed the new discount on the sale page and the old discount (later date) in the release post for a short period of time, then it got changed.