I'm not sure about the log posts every three days. I do know they don't want you using you master password anymore to log in and out of Steemit. They want you to use the posting key. It sucks because a lot of people have been locked out of their wallets due to the change.
That sucks what people are going through.
I answered the question my self. I have to log in to “redeem rewards”. I was hopeful that it was automatic.
It is a strange way it works though.