The style of the text is a big giveaway to me. Generated text has gotten a lot better (ie usually legible), but it’s pretty much always that same block letters that aren’t quite perfect enough to be a typeface, but also not designed well enough to be made by hand.

The general format of this one is also fits closely to a lot of other generated posters I’ve seen (some examples: lemmy.ca/…/2d35f3bf-bc05-4971-8c8d-9e69fe857bde.p…). It’s hard to describe, but hopefully you can see what we’re talking about.