It turns out that Dimension and TMM are engaged in a legal fight over the ownership of key technology (TMM is the plaintiff). While I am more interested in the technology itself, the legal issue is of course a red flag from an investment perspective. I recommend waiting until it is settled.
Which could take a while. The specifics of who-did-what-to-who-and-when are sadly complicated. Long story short, there is confusion over who exactly was given a proper licence to use Iterated’s technology. Fueling the fire further, Dimension has filed (and been awarded) patents on what appear to be the exact technology TMM is using.