Also a leader of a community where these users have contributed to some degree. As mentioned in another comment, there are some suspicious 'coincidences' here. On other social media platforms, there's really nothing wrong with using multiple accounts. As long as the content in each is original and not plagiarized, I don't really see a huge problem with it.
If there's repetitive content, or plagiarized to some degree, this does pose a problem. Have you managed to actually see any repetitive content? Does the content look to you like it was sourced from elsewhere, or appears to use AI without attribution?
Those factors would be pretty important for me to make a determination.
Cheers!