To their credit, CMON actually answered some of the questions regarding the expansion -- they're not always good about that. The answers are plausible, so I'll give them the benefit of the doubt. Here are a couple of the pertinent answers:
Q: Why were there different prices for the initial limited quantity R'lyeh Rising pledges?
A: The production process for the giant Cthulhu is quite different from our normal figures. It uses a rotating mold that deteriorates much faster. This means the mold needs to basically be redone after every hundred or so figures are produced. To account for that, we slightly raised the price of extra batches of the giant Cthulhu. We honestly didn't expect such a massive interest in the piece, though. So with the unlimited pledge we were able to stabilize the cost since economy of scale really starts to kick in when we have thousands of orders, offsetting the extra mold costs.
Q: If you can produce only a couple hundred giant Cthulhu a month, how long will it take you to deliver to all backers with the unlimited R'lyeh Rising ($250) pledge?
A: The slower production time we originally expected was based on a production method geared toward meeting a very limited demand. The overwhelming interest for the giant Cthulhu will allow us to change the production process, creating multiple simultaneous molds in order to achieve a much greater output, and deliver to all backers not much later (and possibly even earlier) than the delivery estimates.
Q: I'm not interested in the giant Cthulhu figure, but would like to play the R'lyeh Rising episode, can I get those components without the figure?
A: The R'lyeh Rising episode is based on the premise of being played on the giant Cthulhu figure. That said, we are discussing with the designers to see whether it would be possible to create an alternate version substituting the Cthulhu figure for some kind of board, and offer that as an Optional Buy to those interested. Not making any promises, but we'll keep you updated.
They also clarified the story behind the episode -- basically, it's not the "final" chapter ... The premise is that you lost the main game, and you have one final option to put down Cthulhu. So, that makes me feel a bit better.