I haven't been active at MARP for very long, but to me MARP has two main attractions.(posted 9285 days ago)1. You can compete with other players just as you could in a "real world" arcade.
2. You can watch other players play the games in ways you wouldn't think possible and get a great deal of pleasure out of it.
When it comes to marathoned games there are a conflict between these points, at least for me. If marathoned games are ruled out, you wouldn't play the game just as it was in the arcade. If, on the other hand, they are allowed, most of the fun of watching these inputs are lost, since most people (including me) don't have the stamina to watch a multi-hour recording. Even less people get any pleasure out of it.
An easy way out would be to vote for split games. But I will not do that, since my opinion is that splits are only justified when the game contains different "games in the game."
Since I really enjoy watching good inputs, but haven't got the time or the stamina do it for hours and hours, my vote is for D.