Am I doing something wrong on my NYC roommate search?

Hi all! Planning to move to NYC this July and have started the roommate search. I’ve gotten some people who I think would be solid leads message me with a background about them, share we have similar interests, and ask me if I would be interested in chatting more. For everyone I respond with a greeting and let them know I am interested. Then there is just no response from them after that?! I literally have 5 left on read messages of me saying I’m interested and then I am just ghosted…am I doing something wrong? Im not from here so not sure if I’m not following the proper etiquette? Like should I be immediately responding with my # or talking about setting up a video call? I’m very confused here haha especially since they have all reached out to me first!