Golang already provides bindings for the polling syscalls (e.g. https://gcmurphy.wordpress.com/2012/11/30/using-epoll-in-go/). Someone can write a library to do what you describe.

They have ads: https://developer.apple.com/app-store/search-ads/

Search advertising doesn't require massive data collection, just bidding on search terms. Anyways, I bet anything Apple makes on app store ads is a rounding error compared to their hardware business. They probably don't care that much, and certainly have no need to go into the surveillance business.

They have audience options for ads (like age/gender/location, see http://searchads.apple.com/how-it-works/#features), meaning they collect data about their users as well.

Also, they colluded with other companies to, effectively, keep employees' wages down. Amount of money they saved was probably a rounding error for them in this case too.

If it's cheaper than ebook.

Same. And I'm still surprised to see how often this is the case.

Here's a talk by Richard Feynman where he explains how computers work https://www.youtube.com/watch?v=EKWGGDXe5MA

It looks like a weekly cycle. Maybe some businesses use TOR during weekdays.

I will change to feedheap.com beacause of very GReader like interface.

It seems feed items are back to normal now.

if all you need is Perl regexp you can use grep -P, no need to stop using grep