Everyone that attends gets a point. The person with the highest points gets 5 marrows, then we move on to the next. (In case of a tie, the two people that have the same amount of points engage in a knife fight till a victor emerges.) Marrows are yours to do w/e you want with them.
If you can follow instructions, show up on time, don't leave early, and don't afk through the run then you'll get your marrows fast. It's sad how many people are unable to comply with one or more of these basic rules.