I haven’t done a comparison but i feel less people reply on forums to people than text messages. Even when you know they are online and posting threads. You may have sent them a private message saying Eid Mubarak or something else but they don’t always reply. Even many months down the line. They may have even mentioned they received an Eid mubarak message from people yet for some reason they may never reply back to you.
I don’t know. Maybe it’s just me. But even if you don’t know the person and they are an unknown internet stranger how long does it take to reciprocate a simple action? If you’re not active and don’t log in for 10 months fair enough. But if you actively post how long does it take to reply.