Some further analysis shows that all 3 are using the same name server provider (AWS) and have the same registrant name (a company called PERFECT PRIVACY, LLC). Techtimes and HNGN are also both hosted at Google Cloud, but ibtimes is hosted at AWS. Making it seem like the account is attempting to increase backlinks to their sites. But it could also just be a coincidence of course.
Edit 2024-08-16:
They posted another article from IBNTIMES.
It could be those are just preferred news sources for them. If I were in the habit of reading news and posting what I thought was interesting, I would probably browse a handful of sites and maybe you'd be able to see a similar pattern.
But I can't figure why they never comment. Not even to add clarifying information or links or whatever.
Their posts are largely well received and commented, but yeah it's a little weird. I can think of a few possibilities for this, but whatever they're doing doesn't seem like typical user behavior. They don't seem to be shilling for Tesla because I see at least one semi-negative post.