as far as i'm concerned its not too bad. Advertiser pays website to display ads thus funding the electricity bill.Given the amount advertisers pay and how websites moan about costs some firms must have massive electricity bills.Although i've never noticed my server farm consuming vast amounts of electric.Viewer then blocks advert , so advert is never actually viewed.
A better model would be if the website blocked the ad at source. Then everyone would be happy.
Still only 94 days to go to GDPR. Then i can start reporting ad companies who arnt complying and have annoyed me over the years.
They say that revenge is a dish best served cold, i prefer serving it in liquid helium.