The basic idea: Day9 sez, "Here's an arbitrary restriction(s) that usually negatively affects your gameplay. Send me a video of a match in which you adhere to said restriction (singular or plural), and maaaaaaaybe I'll feature it on my vodcast."
-Ladder rankings for many people get fucked over. Some think this is the intent of Day9.
-Many people hope their matches will be featured on Day9's weekly Funday Monday segment.
-Said people usually use Day9 as an excuse for their bad gameplay when attempting Funday Mondays.
*at beginning of match*
Player 1: glhf
Player 2: u2
*at end of match, when Player 2 is losing rather badly*
Player 1: You've been playing rather badly. Kinda odd...
Player 2: Day9 made me do it!
Player 1: oic
I got shit due tomorrow. Wanna funday it?