esert

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 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.

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

If it's cheaper than ebook.

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