Speculative fraud hypothesis

[dexdex]

How exactly does the TnT model give rise to this word structure?

Only if there is a long set of rules that have this effect. And that defeats the purpose.

As far as I can tell, for the self citation you only require a couple rules:
Create new words by either:
1) taking a previous word and changing a glyph to a similar glyph
2) add a prefix from a list of prefixes if it isn't in the word
3) concatenate existing words

A vast majority of the words would fit these rules. Now, if we add a little per-scribe personal touch (beautifying marks, preference for certain word shape).

I think that is the conceit behind the algorithm, and it is certainly not a complex process.