That doc waits until the very end to say how to sign up, which directs to https://www.ultraworking.com/work-marathon https://www.ultraworking.com/work-marathon,

That doc waits until the very end to say how to sign up, which directs to https://www.ultraworking.com/work-marathon https://www.ultraworking.com/work-marathon, which says it is $100 to sign up. I might actually do this, just for the new experience, could boost my entire output over my career!