There are bigger fish in the pond than Unique. But none of them have the clout to outright restart an abeyant product line. The most they can do is private label some of it if they wished to do so.
Please keep in mind that Fuji offers a huge selection of RA4 paper products; so don't base your opinions on anecdotal evidence with just one of them, and probably not printed optimally anyway.
Many papers and films get sold long after their packaging dates. I've seen liquidators offer RA4 papers two decades old. I didn't take the bait.
In another line of business, I had to compete against Chinese fakery all the time. It was easy to spot. But the most remarkable example wasn't high tech at all. A simple Chinese farmer attached a fossil reptile tail to an early feathered bird body fossil using color rice paste glue. In a rush to acquire this remarkable specimen, none of the bidding parties even bothered to use a simple 5X magnifying loupe, which would have instantly detected that on the two pieces of sandstone involved, the orientation of the sand grains was completely dissimilar. A museum in Colorado paid a 100K for it, sight unseen; and even Natl Geo published a feature article on this allegedly remarkable discovery without even closely examining it. Too good to be true is typically just that - too good to be true.