[asdf000333]

The talent follows the money. Consider what was hottest during the 2000s-2010s tech boom, startups offering free services with the value proposition of eventual data collection for ads.

Maybe also look at value instead of revenue, in terms of public market caps or private acquisitions. At least Facebook's $1.48T market cap is derived from ads.

[throw10920]

That doesn't answer the question. I asked for, and I quote, "any particular non-trivial fraction of engineering talent has been wasted on ad algorithms, or that those are the "best and brightest", or that those people would have been doing other useful work if the ads didn't exist".

Your inability to provide evidence is suggestive that the evidence does not exist.

[asdf000333]

I'm not sure what else you want beyond my answer, maybe proof that these big tech companies have indeed been hiring bright engineers, but maybe you or someone else can find it on the Internet. I'm gonna go ahead and agree with Dig1t on this.