Definition of "advertiser"

The dirty secret of the internet is that all this distraction and interruption is immensely profitable. Web companies like to boast about […] and so on. But the real way to build a successful online business is to be better than your rivals at undermining people's control of their own attention. Partly, this is a result of how online advertising has traditionally worked: advertisers pay for clicks, and a click is a click, however it's obtained.

2013 June 21, Oliver Burkeman, “The tao of tech”, in The Guardian Weekly‎, volume 189, number 2, page 48