Nobody isn't going to introduce new rules or restrictions because of one or few users who behaving in that way. Haven't looked at posts of this users deeply, but if you feel that he is spamming, just report his posts. It will be deleted and maybe he will get temporrary ban.
Assume he composes these posts and when are ready, he releases it in a series. This style is not common but I would like to give the example to show that quality is key of deciding a post is spam or not spam, should be deleted or kept and a poster should be banned or not.
In past I was doing something similar. I had opened multiple topics on few tabs and was writting in several of these topics. It was normal posts, it took a while to write it, it's not that I was jumping from one to next topic. I just published it in short time interval, so, it might be looked like burst posting. But I don't see burst posting as very big issue, as long as it's quality posts.