The digits of pi are public domain. However, my Internet Pi Server only lets you copy 10 digits per day. These 10 digits are served up as a PNG file that carrie

The digits of pi are public domain. However, my Internet Pi Server only lets you copy 10 digits per day. These 10 digits are served up as a PNG file that carries a watermark across them. You can't use them for commercial purposes. You also can't query my Internet Pi Server in an automated fashion. None of this means that I'm holding the digits of pi hostage. My digits are only a copy. You are free to calculate your own digits of pi and serve them up under whatever terms and conditions you choose. That's the nature of public domain. If you don't like the way Google serves up its digital copy of a public domain book, you are free to do what Google did: seek out the book and make your own digital copy. You can then let others use your copy however you want.