Most ski resorts prohibit freelance instruction on their property. Snowmass is on US Forest Service land. Resorts on US Forest Service land typically let the USFS police freelancers since Federal law requires any business operating on USFS property to be done under a USFS permit. This includes freelance instruction. Instruction done on any resort property without permission of the resort is against the law (either trespassing and theft of service on private property or operating without a permit on USFS property). EpicSki policy is that we will not facilitate illegal activity. Please be aware that many resorts monitor social media sites in order to catch freelance instructors.
There is a fair amount of freelance instruction that does occur. Most resorts tolerate a low level of it because 100% policing of it would be intrusive and offensive to innocent guests (e.g. friends/family helping friends/family). But every now and then the level of freelancing gets high enough (or a particular instructor gets brazen enough) for the resort to decide that an example needs to be set. These situations are "unpleasant" for both the freelance instructor and the student. Another aspect to consider is that freelance instructors are not typically covered by insurance. Should you get injured in your lesson due to negligence of the instructor, you're likelihood of getting compensation is low. One final aspect to consider is that knowledgeable and quality instructors do not freelance for the above reasons. Your chances of getting a quality lesson are significantly lower when you go the freelance route. For these reasons, should you choose to pursue this route, there is risk involved.
There are ways to get quality instruction at a discounted price. This thread has some good suggestions. There are also third party instructors who operate with the permission of the resort either through camps (e.g. Mahre, NASTC, Windell) or as part of group trips. Some ski clubs arrange to have their own instructors teach legitimately on their club trips (e,g. DC Ski). I strongly encourage you to pursue these options over freelancing.
mod note: this thread is being locked per site policy