A search for Threads content on Twitter currently brings up zero results, despite plenty of links to Meta’s microblogging rival being posted on the platform.
Wasn’t there just a case where they ruled that a homophobic bunch can refuse services to LGBTQI+ members? If so, this might fall under the same freedom of business. I however think it’s really sad (especially in the above described case).
You don't have to be American, if twitter works in your country, then it should at least on your country follow your rules or they could be blocked by your ISP
Technically yes there are anti-monopoly laws in the US, however they aren't really used much anymore because so much of politics is dominated by corporate money now
Generally speaking, anti-competition laws here are focused on abusing a monopoly, and Twitter very much is not a monopoly, especially given the extremely successful emergence of a strong competitor.