I was sharing with reddit also and you are right, they do tewll you to try back later. Later means a day or so later. I was sharing with reddit each day because I was writing a hub per day and they told me too many links (articles) If I waited about two days then the link would work.
Why it happens I have no idea.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.