The key here to me is
"""since Amazon doesn't produce or sell DVDs for these Prime Video series, there is no doubt that they are created from illicit sources. """
OK, Amazon, if you released them officially you would then find the pirates would not bother ... literally these bootlegs exist solely because there is a demand you are not filling
However, I get it - you're looking to maximize profit and keep people paying for Amazon Prime so you have little incentive to sell the DVDs and the suing actually about protecting that prime subscription base and not really about the specific DVD / series
The whole buisness model is set up to squeeze money out of people in "recurring payments" monthly
Funny enough I have paid for Aamazon Prime for years not for video access but just for the prime shipping and such - it's worth it to me for that ... I hardly use Prime Video except the rare times when a series is Amazon Prime Only - funny thing is I'm old and salty - I prefer physical media so while I might watch an original series on Amazon when it comes out - if I like it, I'd actually pay for the DVD to have on my shelf - so they can't "1984" it at some point.
(referring to what Amazon did to 'unauthorized' e books fof 1984 not to the actual story itself for those who don't know look it up - it was .. ironic to say the least)
As a lover of niche/ecclectic films, I have a pretty big collection of "box office flops" that I hold very dear (Tampopo, Bagdad Cafe, Harold and Maude, Logan's Run, A Boy and his Dog, .. you get the idea - lots of stuff that was not really big blockbuster and yet are arguably "classics" ... and which if I hadn't bought the DVD when they were available would likely be utterly inaccessible to me as those often also get discontinued.. I had to hunt hard to get the complete collection of LEXX (and one could argue fairly that I'm insane for even wanting it but don't judge me - I like my quirky stuff...)
Anyway, point is that with streaming services they have no incentive to release DVD/BluRay/4k of their shows - they would rather you keep the service every month - except they break the social contract in my opinion by arbitrarily removing series - so you get a great series and have access then one day it just goes... and you've got no choice
so YAY for the pirates because if I wanna watch say "Max Headroom" TV series what other choice do I have ? (bad example that one actually finally DID make a release but I had long since bought a copy someone TiVo'ed off The SCI-FI channel or whatever way back
There was this web site named for tales of the golden Monkey or somethig that had a bunch of these - they specialized in cult shows that had never been officially released on DVD - when a show released they'd stop selling their pirate versions - was a good model - probably sued out of existence ... dont know..
still I get shit from my partner about how many DVDs I have taking up space in the bookshelves in the rec room, but at least I can watch Dark Star whenever I want without worrying if I have a current sub to "whoTheHellEverWantedToWatchThat.com" :)