The original plasma field was inspired by Dr. Dan Winter’s Theraphi it seems from your post you have already researched it
After that, Dreamweaver created plasma protocol which was a collection of three fields which built onto that. It was more focused. Those fields are not sold anymore.
He then created plasma flaunt, which as far as I understand it, is the newer version of plasma protocol combined into one field, and perhaps, built upon from there.
So plasma flaunt does include the plasma beach field- but it is much more complex than that, although the original field is a wonderful, beautiful gift to us all- and it is very advanced already.
So why is plasma beach free? Because we are spoiled.
Further, Plasma flaunt is very worth the purchase.