I have been pulling the thread on this a bit more. Again, Tony's video is a terrible introduction into this issue, and take over 20 minutes of rambling before any real substantive content is given. With that, there are a bunch of vendors that were shut down, so it looks like Traxxas went after a bunch of little guys selling aftermarket parts for the TRX-4M. These small vendors, in themselves, cannot afford to battle Traxxas and their army of lawyers. But, these guys could file a class action suite against Traxxas for harassement and unfair business practices.
The root issue here is Traxxas apparent business plan for the 4M, it seem like their plan was to make their money off of it by selling upgrade parts and premium prices. These mom-and-pops can produce better parts and a lot cheaper prices, and that really threatened Traxxas' profitability of this particular model; which is why they haven't gone after the same type of parts for their other models. It doesn't really look like there is any real case here for Traxxas, more or less they threatened the site providers and they shut down those sites, with the providers not wanting to spend money on any kind of litigious action.
The root issue here is Traxxas apparent business plan for the 4M, it seem like their plan was to make their money off of it by selling upgrade parts and premium prices. These mom-and-pops can produce better parts and a lot cheaper prices, and that really threatened Traxxas' profitability of this particular model; which is why they haven't gone after the same type of parts for their other models. It doesn't really look like there is any real case here for Traxxas, more or less they threatened the site providers and they shut down those sites, with the providers not wanting to spend money on any kind of litigious action.