I'll be interested to see how a Twitter mode could work alongside the longer posts.
I think there's an audience for everything, might be interesting for some people.
I think posting rate should be related to your reputation.
Reputation is a vanity metric. Its usage on Steemit is purely frontend based (it hides the posts from the site, but they are visible on the blockchain). I think something more alongside the bandwidth algorithm already in place would be more suitable.
That's interesting. So the 5 minute limit is at the blockchain level, and would then affect busy.org, chainbb etc
I think reputation is more than that as it can be driven down if people think you are behaving badly. We want to protect the users from the bad apples. I'm sure the team have considered various options for this.