Pos 3.0 brings incitement for people to operate online nodes and be active in the staking process.
before 3.0: The best strategy was then to keep your node offline and then only bring it online rarely to get a huge stake payout. People with not many coins got a small stakes while people with lots of coins got large stakes.
after 3.0: You need to run an always online node if you want to get your 1% interest. People with not so many coins will get a much higher stake reward relative to people who have a lot of coins. If you have a lot of coins and stake all the time you will be granted your 1% interest. If you have a lot of coins and do not stake you will be granted 0% interest. If you have not that many coins and stake all the time you will be granted more than 1% especially in situations when not all issued coins participate in the stake process.
We have considered implementing some form of delegated pos, but rather than focusing on that layer of development, we'd like to quickly roll out the service layers that allow quick interaction and inter-operability between 3rd party services. After the roll out of our base client, the follow up will be some js libraries which will allow developers and service providers to make quick and easy invocations to the blockchain.