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Google gives Android users a way to install unverified apps if they worked hard for it(including waiting 24 hours)
(android-developers.googleblog.com)
This is a most excellent place for technology news and articles.
they want to suppress the developers, not users. By making it so bothersome, so many people will just stop using sources from outside google play. First they do this and at some later time they will add more hoops to it. If they manage to strangle any developers that make stuff, people will have nowhere to turn yet they cant complain either because google will have undeniable monopoly.