Ah, well you get points from trophies you earn from posting messages and earning reactions from people.
If you go into the [About] section of a profile, you'll see at the bottom of the page a bit sub-headed [Trophies].
You get more trophies for messages than reactions.
Getting 1k messages gives 20 trophy points, hence why those with 1k+ message counts tend to have 113 points.
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There's a max number of trophy points for reactions.
I think it's something like getting 500 reaction score is the last trophy you get for that.
Whereas 1k message count is the last trophy for messages.
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