If we stipulate, for the sake of argument, that a different standard is in order for Touring Pros, because their living is at stake (McBeth's argument), or that a different level of public attention warrants a press release (Ultiworld's), then the definition of Touring Pro would be much tighter than the PDGA's current list.
Perhaps some combination of prize money earned (say, $20,000) and Major & NT events attended (say, 75%), and perhaps toss in recent Open Pro World Champions (for their fame). Numbers to be negotiated, of course. But it's a small number of people who are actually touring, not just playing regional events, and earning anything like a living at it.