I agree. The point is, some of the subs on that list (and a few Id include as well) could be purchased for a fraction of the price of one LMS Ultra, therefore allowing the purchase of multiple smaller drivers.
3.4 cubes is small for a 15 ported. Mags like small enclosures on average too, so that's not a good measuring stick. I do agree the one advantage running a single LMS Ultra has over multiple cheaper subs is if you are limited on space that the enclosure difference makes the cheaper, better performing choice (not LMS Ultra) not a possibility. So yes, if you just have to have an 18" sub, and it just has to be ported, and you only have 80% of the space necessary, you might as well bite the bullet and pay whatever Thilo decides they are worth this month. Or maybe find one used for what people use to pay new, if you are lucky. But if space is not such a concern, other options make much more sense than what AP has to offer, considering price.
I use to recommend purchasing LMS Ultras on this very board, back before the price hike. So its not a question of performance, or even personal feelings towards the owner. They are simply priced too high to be taken seriously in most situations. Thilo knew that when he chose to change his business model to accommodate a different market niche. So, sorry to anyone out there who is now offended when we, as a collective group, no longer look at the LMS Ultra, or really most/all off AudioPulse's products, as relevant to the average consumer or even enthusiast. Blame Thilo.