Gotcha. I was thinking that LLN was being used generically to mean 3char mixed L's and N's. I agree w/ you that most random, as well as, serialed LLN's, that don't connect to a meaning, would be hard to find an obvious commercial use for and have the negatives you described. A few mos ago, I did pick up a couple of dropping random mixed N/L .com names, 0RJ.com is one I remember). because I saw they were being gobbled up as soon as they dropped, which made me think they were hot- but I really don't know what I can do w/ them. Perhaps they will gain a life of their own and have value someday, (cringe), as a collectible. Not my cup of tea, but it is a possibility, though, perhaps, a little far-fetched.
In a sense, the domain name market has, itself, evolved into having a life of it's own, because income can be generated through a name alone, independent of any direct attachment to a specific business. The concept that a domain name's *only* purpose is that of a direct gateway to an online goods or services enterprise, seems to have become obsolete, at least among our crowd, but I digress.