Every post here will have many more views than responses. Because we are open to guests reading. Bots also count as views. And often people will read to see if they can reply. But don't have anything to add. Or they make a note to come back later once they've had a think about it. [I do that.

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As Opus said. The first few posts can take a while to go through. It depends on what mods are around. And whether they are busy with other things or have a chance to look through the new posts list. Sometimes they're dealing with a tonne of spam so legit posts are left while a wave of spammers get banned. And sometimes there's a query about a username or contents of the post or location. So the post may not go through while that's resolved. It's never personal and we always get there in the end!
For getting replies. It does help to post to other people's threads, too. Some forums are very high in short term visitors. Who post once or twice. And then disappear. So it can be quite hard to get replies and discussions going there. As a frequent poster myself. It can be quite discouraging when people don't even acknowledge whatever I replied. The secret [such as it is.] Is to post to other people's threads too. That's partly "being the change you wish to see in the world."

And partly because people are more likely to be curious about your reason for being in the forum. If you show an interest in them.
About PMs. Those are always sent immediately. But they sit in the Outbox until they get read by the recipient. I have plenty there right now. Going back to October 2012.

Since people never logged in again to read them.