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Those "other revenues" only account for about 13% of Google's revenue. So its a fair comparison. Google is almost 90% an advertising company.

https://abc.xyz/investor/pdf/2017Q4_alphabet_earnings_releas...

Yes because all those apps exist... to funnel people towards Google's extensive advertising network, so the money shows up as adbiz revenue instead of with products.

So, by pursuing other technological innovations, they are able to expand their advertising business?

Extensive non-advertising product offerings that somehow don't translate into extensive non-advertising revenue...

"if you believe that these are all just advertising companies."

I'm not the one calling Google an all-advertising company, I'm just saying that if it is, it's by far the biggest.