One wonders if these other products include recreational substances and black market branding, as it would be a fun project to write the openCV code to extract a Vornoi map of the image of the pill and determine if a hash of its matrix were found on something like public ledger. Perhaps using a Bloom filter. Phone cameras are good enough that you could use these maintain some integrity in a reliable black market brand.
I actually like this candy version better than other PUF proposals because a person can reason about it and prove it to themselves, whereas other opaque methods like crystals and chemistry reduce to "Trust us! I didn't quite catch your affiliation..." As a standalone product, I don't see this candy tech flying, but as a solution with open implementations, I could see it being useful.