I understand that Steemit is trying to create demand for Steem outside of the platform in order to avoid inflation... this is not the way.
Adding ads runs counter to the core philosophy and revolutionary idea that is Steemit. It's all about how value is inherently attached to these blog posts... not to the ads in them.
As posts above have stated, we've been through this before. Adding ads actually subtracts so much value that it might actually destroy the platform. We need to think more creatively about other methods to create more Steem, including creating incentives for businesses to use it, for users to attract users, etc., etc.
This is almost certainly a bad move.