The question you should always start with is why and if you can’t come up with a why then you should start from a more neutral position on the behaviour.
Spam isn’t free to engage in, especially on platforms like Facebook, and spam is rarely an irrational money-losing act, it’s just profit generation on the wrong side of our view of what is ethical. Why would someone spend money to unleash chat-bots on a Facebook group to discuss a piece of furniture?
If you can’t explain why, your theory is probably wrong. I would be absolutely shocked if it’s anything more than just some real people who love furniture and use a localised phrase that you don’t recognise.
That said an interesting advance on real game bots would be ones which use AI to chat and respond to other players actions or messages.