> gerund or present participle: dogpiling
> (of a number of people) jump on top of another person or one another so as to form a disorderly heap. "the players poured out of the dugout to dogpile on Wright at second base"
> to move or press forward in or as if in a mass
And "pile on" has a different meaning: https://www.merriam-webster.com/dictionary/pile%20on
IMHO, it has always been crap, because of their biases, and pandering to their audience.
But that's beside the point. "Mistakes in a headline" happen to the best of outlets, and always have had. I assume you are OK with an outlet making a typo now and then, no? (There's even a name for this phenomenon, the "printer's devil"), and that making some doesn't mean the outlet's journalism is bad, right?
Your question would only make sense if they frequently made typos, and showed some huge careleness about it. Not something one would generalize from seeing this ONE mistake.
Anyway, this isn't even a typo or mistake. It's a well known expression. Wouldn't it be prudent to first look it up in a dictionary before questioning those that dared to use it? It just means that SV businesses are jumping in that particular domain (piling in: to move into a place quickly).
Silicon Valley is getting into the snooping business
Silicon Valley is getting in on the business of snooping
Silicon Valley still snooping, like it has from before anyone called it “Silicon Valley”
You are the problem, not journalism.