“Hey.” “Hey.” “How are you?” The end.

In that example you are expecting that someone gives you a significant answer after you wrote 4 words without any substance. You are requesting that they invest more energy into the conversation than you even through you started it.

If you contact me online, I usually have a choice between continue doing what I'm doing or switching my attention to the conversation.

Most of my online conversation happens for a purpose. I might contact someone to arrange a face to face meeting. I might contact someone to ask them for information. I might ask them for their perspective on an issue I'm facing.

I'm also happy to answer quest of other people for information, help or meeting up.