Only @JordanLee knows the initial distribution, but the important point is that there were no free NSR given out to anyone. All members of the initial development team paid for their own shares from the undistributed pool at varying market rates. Jordan placed caps on the maximum amount of NSR any one person could have so as to promote widespread decentralization. I think most early purchasers were limited to 5,000,000 NSR maximum. The Undistributed NuShares thread is here: Undistributed NuShares
We’re already the world’s first stable decentralized digital currency. I’m not sure what the current theoretical maximum is for transactions per second, but there are a number of development improvements that can be made to scale that capacity upwards if needed. We are far from hitting the current theoretical maximum so that development hasn’t been prioritized yet.
Nu v2.1 will be arriving soon, which will feature significant improvements to speed and memory usage. There is no official Nu web wallet yet, but there is a community member who has created an early beta version of one: NuBits Online Wallet.
If someone could translate this for @luxiang7890 that would be appreciated!