I find LinkedIn useful, but absolutely refuse to install the app on my phone. I figure it’s enough to give them access to my contacts and resume to monetize, they don’t need my location also.
Whenever I get an email notification that I have a LinkedIn message, I check it the next time I am at my desktop. Then, without fail, after I check it they send me a follow-up email reminding me that “LinkedIn is better on the app!”
That just reinforces the idea that I will never, ever install their app.