Members have an option when it comes to Conversations. They can choose to let "Members Only" send a PM/Conversation or "People You Follow Only." That member may have it set that only people they follow can PM them.
Can’t on the mobile app :/ Yea I guess. I hate blowing up other people’s threads with my own personal info.
Try using the website instead dude.. I tried using the app once & I didn't like it because I was used to using the site