I hate to quibble with you friend (who'm I kidding, I love to quibble), but Google started out as an ADVERTISING company. They created the search engine for one simple reason, to collect data on what people are looking for, so they could sell advertising in the appropriate areas.We use Google based operating systems. Google started off as a search engine (key word SEARCH) that has morphed into something much more intrusive and possibly nefarious if misused by the wrong sets of eyes. WE happily give Google permission to intrude into our lives every time we use anything Google based. What they do with that intrusion is still debated frequently but nonetheless WE do it voluntarily on a daily basis.
Using Google anything and then complaining about unknown sources and unwanted intrusions is like eating fast food exclusively then complaining about being fat and feeling like garbage all the time.
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They made their search engine ridiculously simple and easy to use and super powerful so more and more people would use it and therefore, they'd get more free data.
They've always been collecting information about us, as seen in the thread on this forum with 6 links to show you exactly what Google knows about you. The more they know about consumers, the easier it is for them to sell ads and more ads and maybe even a bit of demographic info on the side.