@Britsfan I think that making moulds for resin is cheaper than making moulds for plastic - I'm no expert, but I think that is the case. I'd say that RedBox didn't expect to sell very many of these so the expense of making a mould for plastic would not be recovered. Perhaps.

orion made their byzantine sets in both resin and soft plastic.they made a few poses per set in resin then included all in the plastic set,if memory serves.i wasnt aware of a market for resin figures,but i guess there is.

There are lots of 1/72 resin figures around: Dan Taylor Modelworks, Retrokit, Solfig, W^D Models, Milicast, MGM, even Cromwell make a few figures in resin.