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Yeah, at Steem Fest 2 they mentioned it may be raised to 10.

Ah... sorry, I totally forgot whitepapers are usually out of date seconds after being published. Thanks for that.

Since Steem now supports perpetual edits I think white paper also needs to be moved to a steemit blog. That way we can track all the edits and whitepaper is upto-date.

You are definitely not wrong there! That's a great idea!