Yes, but they get to choose who to sell the Dev Kit to, and they'll only do so in accordance to their own aims. Otherwise, heck, by a literal reading of that statement, every RPG company in the world could band together and pay a single dev fee to
WotC.
I imagine that the intent of that answer was to cover a major publisher who used another company as a design studio, not for dozens of small PDF publishers to band together and purchase super-cheap dev kits.
Anyway, we'll find out when they answer. No point tryng to second-guess them here; they'll tell us soon enough.