Open Baffle. Why are they mostly limited to DIY?

I suspect that another issue for companies that make and sell loudspeakers is the reputation for open baffles like planars and stats needing 3-5' of space. This is a pretty big market limiting factor (fewer possible buyers).... so maybe not the easiest segment to enter and have a viable business???

Open baffles don't always need a lot of power. I heard the spatial audio turbo m3 in salt lake at their assembly facility through the 25 wpc Rossi integrated.  They easily played at 90+ db 14 feet back. They sounded really good. Very smooth, detailed and huge sound stage. 

Based on Clayton shaw's comments from this link.  Spatial audio intends to sell the bottom half of their X2 model as an open baffle sub 

http://www.audiocircle.com/index.php?topic=153006.60

So here is a "no risk," return it if you don't like it, $450 chance to try an open baffle, full range driver, no crossover loudspeaker that got a pretty good review.. (watch steve deckert's video midway down the page

http://www.decware.com/newsite/Caintuck.html

http://v2.stereotimes.com/post/caintuck-audio-betsy-openbaffle-loudspeakers