But on the other hand, they did come back to life, not only to recreate originals but to create new, interesting designs. So even though the Minimoog hasn't been in continuous production since the original, they do still sell it today.
Plus, the new company is mostly employee-owned. If you're ever in Asheville, definitely check out the factory for a free tour as well as the Moogseum.
On to Behringer. What they are doing is questionable, especially around the Minimoog and ARP, two models that are currently in production by the original manufacturers.
However, I think there's an easier case to be made for the old designs that are no longer in production (e.g. the Juno 106, 808, 303, etc.).
Even though Roland makes some modern products that include the functionality/sounds of the originals or mimic the look and feel, they are still generally based on virtual engines instead of analog circuits. Argue all day long about the sound differences, but synth heads tend to love analog. Korg has done a better job at cranking out desirable analog designs.
What Behringer and Korg are doing, that Moog arguably isn't, is creating desirable analog synths that hobbyists can afford. Yes, they were never this cheap back in the 70s/80s. But it drastically lowers the cost of entry for people just wanting to get started and not wanting to use a DAW for everything.
I'm excited for the 909 clone as that has the best pads to my ears. I'm considering getting a DeepMind, which is inspired by the Juno 106 but different in many ways. I could see a TD-3 in my future. I'm less excited about the Poly D and ARP, but that could be my own musical taste as well.
Related note: why didn't Behringer include a batteries option in the 303 and 606 clones? I see these as almost perfect competition to Volcas, but Volcas have battery options and are way more portable. I know the originals were only hardwired, but still.