I agree Google's revenue will not grow 20% annually forever, but I don't see any problem with my 10-year projection. When I watch YouTube I see about 30 seconds of ads for every 10 minutes of video content. I could easily see this rising to 60 seconds over the next decade.
And the ads I do see are not very well tailored to me: I see cat food ads even though I don't have a cat. I see gambling ads even though I've never gambled in my life. I see ads for a sit-stand desk even though I already bought it. I never see MacBook Pro ads even though I put one in my shopping cart on Apple's website 6 months ago but did not purchase it. (Google has all my photos, all my emails and my location history for past 4 years, so Google should know all this).
Google has a long way to go to maximize the effectiveness of their ads.
And the ads I do see are not very well tailored to me: I see cat food ads even though I don't have a cat. I see gambling ads even though I've never gambled in my life. I see ads for a sit-stand desk even though I already bought it. I never see MacBook Pro ads even though I put one in my shopping cart on Apple's website 6 months ago but did not purchase it. (Google has all my photos, all my emails and my location history for past 4 years, so Google should know all this).
Google has a long way to go to maximize the effectiveness of their ads.