Note that this is in federal court b/c of the statute (federal question JX) which only requires notice pleading (alleging facts sufficient to support a claim). It is an easy standard to meet because the court assumes everything you say is true. The motion to dismiss was denied without prejudice so the defendant will move again, but the court will likely still want to see discovery begin.
In that event, the case will go to trial. After MSJ, the parties will usually settle 90% of the time. So while it is unlikely that this will go to a decision, the plaintiff is a law professor and is seeking compensation on the order of minimum wage for herself ($7.50 in Missouri) and she volunteered twice in two years or something. So damages in the amount of about $100 for her efforts.
The attorneys are trying to cert for class action but didn't do so on this attempt. That is where the big money will be because CompGroup will immediately be insolvent.
Here is the legal standard for "employment" in the case is Tony & Susan Alamo Found. v. Sec'y of Labor, 471 U.S. 290, 301 (1985).
My fear is this: if CompGroup loses on MSJ then I can guarantee that it will have an immediate chilling effect on any races which use volunteers. Prices will either skyrocket or the races will simply not be held. All of these road races that we love to run in will simply not exist.
Read the actual order here:
http://leagle.com/decision/In%20FDCO%2020150512A17/LIEBESMAN%20v.%20COMPETITOR%20GROUP,%20INC
.