You can look at what percentage of each big tech company's revenue is ads or how much they've spent on their advertising platforms.
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.
Your inability to provide evidence is suggestive that the evidence does not exist.
It's not hard to see that your response does literally nothing to answer my question.
> I'm gonna go ahead and agree with Dig1t on this.
It's crystal clear that you don't have any evidence for the claim, so your opinion is meaningless.