anytime I get a message like that I just wait for however long it says and usually the problem goes away. Not sure if this is based on account activity or status. Just posting how it works when this happens on my end.
It is based entirely on account activity. The higher the activity, the lower seconds you need to wait in between each post.
I have 182 activity; a few seconds is all I need to wait between each post. Be patient guys, and soon you'll be able to post your ideas and opinions at the pace you want to.