I would sign up but the way i read it, its more about just doing 100% of what you initially say you are going to do, if it was a total distance thing i would be in as i got a few ultras in feb and march but i dont think it would help the team really - unless i said i was only going to run 35 mile a week and actually did 70
It's about doing the number of runs per wek that you say you're going to do.
January is just that, 4 x weeks of n number of runs per week
February is the same as January but you also specify how far your longest run is going to be and hitting that mileage during that 4 week period.
March is maintaing January's runs per week and Februarys distance but also targetting a time for a race/ or distance. This one is tricky because you have to be pretty precise and are quite heavily penalised (points wise) if you over/under estimate your pace ability.