The irony is that they are probably limiting their profit too. With lower prices the number of applications would skyrocket and they would get much bigger income.
The only reason I can think of is that scaling the production would be difficult for some reason?
From skimming through their website, it looks like they target business applications with bigger displays (Health Care, Transportation, Industrial & Packaging, ...) which I would assume are high margin contracts.
So maybe another reason would be that offering lower prices for big displays would reduce profits from these business clients more than it would increase profits from the additional low-margin mass-market volumes.
If large screens with a decent refresh rate were readily available and competitively priced, I imagine they'd be a huge hit with devs - I know I'd love one.
The only reason I can think of is that scaling the production would be difficult for some reason?