Siri is marketed as a personal assistant and an information machine. If you have a question, Siri is supposed to have the answer, and that answer is expected to be as accurate as possible. On the other hand, we’ve seen the high profile cases where Apple changed the answer, when it didn’t like the results, most notably to the question “What is the best smartphone?” Originally, Siri gave the answer based on reviews found online, and returned the answer: the Nokia Lumia 900. Then, Apple changed the answer.
Now, if you do a search for the best smartphone, tablet, or computer, you don’t get a real answer based on real information found online. Instead, you get an “advertising” answer which points you towards more Apple products. We’ve seen before that Apple has been sued for “false advertising” over the Siri commercials, but now Apple is also being sued because of these sponsored answers (which are only answers sponsored by Apple).