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With reasonably sound confidence these particular posters aren't organic, the posts can be used as a gateway to study their general behavior across threads with the help of the archive.
Method is simple:
>Find a source post you know is a bot (Post must contain an image).
>Go on the archive and match the image hash.
>Ignore any results which contain a different file name used.
>You can confidently presume all other posts were made by the same entity.
>Open threads in which these duplicates were posted, find out what else was posted by the same ID.
You can use this same method to single out new source images.
I have half-assed gathered some interesting posts by the same entity in order to illustrate. Although you should know most of it is noise spam. In any case, no deep conversations or "fun posts" were found. Further indicating this is indeed, a spambot.
You should also note this is but the tip of the iceberg, these posts go back a long time, and the spam is constant.
Do feel free to dig yourself and show us what interesting things you find.
As for geolocation patterns, most are in Australia, but I've seen it change to UK/US/NORWAY and other countries, along with memeflags