I have a feeling courses like these (only not free) will start popping up all over to fulfill the "osteopathic requirement" for MDs that want to apply. I've actually heard from a handful of MD students (mainly ones interested in Sports Med or PM&R) that they wanted to learn some OMT. If it's easy and fits in the time of a rotation, I wouldn't be surprised if some people take advantage of it as like an elective or something.