Even now, the problem is that you want the data sometimes. Like maybe you use Life360 because it's handy for your family. Well, it knows how fast you drive (it likes to tell me my wife's top speed after she goes somewhere...). It has enough accelerometer access to decide if you've been in a wreck. It's a GPS app so of course it has pretty tight location information. And maybe you consent to all this, but hidden somewhere in the TOS it says Life360 may share this info with selected partner companies. Now it gets slurped up by big data warehouses.
Maybe you install a sleep tracking app. Now they know how well you sleep, and I would bet they could pretty accurately figure out if/when you're having sex. Depending on the device, they might even be able to guess whether or not it was solo.
Perhaps you don't like the limited options Apple has for pedometer data, so you install Pedometer++. Another possible avenue for data collection.
Or Instacart, Uber, Uber Eats, etc.
So. Much. Data.
No need to hide it, Life360 clearly states right near the top of its privacy policy "In order to keep our Service free for most users, we generate revenue through trusted data partnerships. We share device data, including location and movement data, with trusted data Partners for tailored advertising"
When your Apple device communicates with "Apple", many/most of those IP addresses are owned by Akamai.
Even when you search DuckDuckGo, both the search results (Bing) and web servers that serve the content are owned by Microsoft (Azure).
So far as their businesses are concerned, the data is safeguarded and I would never expect it to be sold--not by the top of the data food chain in any case.
But there's the issue of data being stored with US companies requiring being subject to US laws, such as the USA PATRIOT Act.
TLS SNI.
"Gmail messages 'read by human third parties'" https://www.bbc.com/news/technology-44699263
"One company told the Wall Street Journal that the practice was "common" and a "dirty secret". ...Google indicated that the practice was not against its policies."