Online tourneys they're fine, if someone wants to skip work or something and play all day that's their prerogative. For live tourneys it's a bit tricky. Timber and Kick were in the FS tourneys before and with a few people marathoning/kill screening them it tied up the machines for a day or two which when you have 100 participants all trying to get on games it's not the best plan if it can be avoided with substitute games/tougher settings. That being said, using the Aurcade system where point differential matters greatly, it makes no sense to play them at all other than to just qualify on it, if you can't marathon it and someone else can.