The Amazon gift ordering patent was revoked by the European Patent Office. In a press release they write: 'The so-called 'Gift Order Patent' has been revoked by the EPO in an opposition proceeding today after a hearing involving three opposing parties and the patent proprietor, Amazon Inc. The patent relates to a method for purchasing goods over the Internet to be sent as gifts.' Santa did not have to lodge opposition against the patent. The opponents were Fleurop, the FFII and the German computer science society. What strikes me is that so many parties were infringing upon the patent, and yet you need very few organizations to file an opposition. Why are not more patents opposed?

Probably because most people either don't know what patents they're infringing on (since there's so many frivolous ones) or know and don't care to litigate (spend more money).