This is the main forum. The other forum would be the Steam Discussions for Unturned.
Nelson periodically reads suggestions (and other random posts) just about whenever he feels like doing so. He does it a lot more often whenever he’s away from his computer, but checks here pretty often regardless.
There’s no “competition” or anything. Your post is a bit more likely to be seen if it’s a high-quality post, with some effort put into it. However, any suggestion can be considered. It’s not about picking “the best” suggestions, it’s about looking over good, quality feedback.
Even if Nelson does not leave a reply on a post, it’s possible that he has seen it. Nelson has looked at about a third of the threads posted here.