AskHistorians is HIGHLY curated - you have to have published bona fides in the field to ‘answer’ a topic (you can still ask questions if you’re hoi polloi)
Mods will not hesitate to remove comments that aren’t substantive
It’s not unheard of to see a topic and notice there are 75 comments and think ‘this seems a lively topic’ only to click on the thread to see one mod comment about the rules of the sub and 74 ‘removed’ comments
It’s part of my love hate - it’s probably the most old school ‘factual’ sites on the web, but unfortunately that also means it’s often the least entertaining