Yeah, I think that is a bit of the problem with pricing for this market.
First, it is definitely a "niche" market. It is not like (at least today) that every, Joe, Jill, and Fido, are forum owners. So, I think, immediately, you have a segmented market. There might be some business buyers who would jump on their product just for convenience/ease of use. But, my sense is that volume in this business would be small business purchasers/hobbyists, who would be turned off by the pricing.
But, I think for a lot of purchasers, this might be a "vanity" purchase (i.e., the cost is not as important as the result). However, for these folks, the price probably doesn't matter. For everyone else, though, I think they would need to demonstrate some value/return on investment. The pricing suggests to me a big FU to most customers. In some markets, this would make sense (maybe high end art, fine wines, etc.). But in the software market, unless they had some huge portion of business segment, this strikes me as a stupid pricing model. But, hey, the market bears what it bears....maybe they have figured out something that is not apparent and are making money hand over fist. If so, good for them. But, with those prices, they are not even in the running or consideration by me.