The problem is that the "patent" (fucking loose term of the word for something that should never have been allowed to be filed) is about the use of the code in question. It's not the App Store that is supposedly infringing, it's the use of the App Store. What a joke.

As I understand, patent liability doesn't stop at any point. So your customers can be sued for using your infringing ptoduct. This has the effect of letting patent owners choose who to go after.

Because it's easier to make money going after small business knowing these business can't afford a lawsuit.

One of these troll companies made $30 million a year doing this and they are even listed on the stock exchange!!

He answers this in the FAQ at the end of the video: Because Google is big enough that it could defend itself.

Yes, that is part of the patent law. 35.271.a: ... whoever without authority makes, uses, offers to sell, or sells any patented invention ... infringes the patent.

That is why that one copier patent troll (can't remember the specifics) files suit against businesses that purchase copier, but not the manufactures themselves.