I realised that last week too. I think my exact reaction was 'what the **** Hot Toys?'
Would have been laughably simple to mount those plates on magnets and include busted up alternate parts.
One thing that's going to be interesting to see: once Avengers 2 is out of the way, we've got a possible extended appearance in Captain America: Civil War and the Avengers Infinity War double feature and then Marvel's done with Iron Man due to RDJ bowing out due to his age and contract expiring. Beyond whatever appears in those films and new versions of Mk I-VII, possibly War Machine Mk I too, there'll be nothing else left that Hot Toys can reasonably exploit Iron Man-wise without the law of diminishing returns setting in. Maybe 1/4 scale figures of the greatest hits, but even those would cater to a more limited audience due to the size and price.
Once the dust settles in a few years time, what will be their next cash cow?