Sure. The same argument applies to the "enterprise modules", which until today everybody assumed would always remain under an open source BSD license.
Your boss has bait-and-switched once now. That's enough for everybody who cares to start risk managing future similar behaviour.
I'm very curious to see if this stands in court, since "consulting" can be considered similar to repairing and there are laws in many countries that restrict a manufacturer's right to limit repairs and who performs them.
At the risk of repeating myself all over this thread, I feel the need to emphasize that the new license does _not_ apply to Redis proper, which, in the words of the post, "is, and always will remain, an open source BSD license."
Full disclosure: Am a Redis Labs employee, although not here in any official capacity.