You see this in all the AI generated Tik Toks. What causes AI to use such a weird construction.
As a proportion of all easily crawled text on the internet, a lot of it will be random marketing copy. That influenced the writing style of early AIs, and since then everyone has trained at least partially on transcripts from every other AI chatbot
Nope! That is - training on lowest-common-denominator, low-signal high-noise "idiotspeak" was not at all inadvertent.
Like Caesar's supposed "Veni Vidi Vici" saying, people seem to prefer and remember items when grouped in three.
I recall a public speaking film shown to my management science class starring John Cleese mentioning this rule of 3.
4chan
Call of Duty chat logs
Every public marketing site
SlashDot
UseNet
...
Verdict: Yes idiotspeak was part of the training set, but no, it was not inadvertent. There's a smattering of Shakespeare in there, at least.