The socio-economic side:
There has been a lot of debate in recent years about the effect of ad blocking. Google "effects of ad blocking" for some interesting reading. There's a bunch of interesting articles linked here:
https://adblockplus.org/blog/the-devastating-effects-of-ad-blocking
OMG - these people who provide content need to get paid! Why do you think you deserve it free?. Yeah - no. In my experience, very little content is actually original. A huge percentage of websites simply slurp and regurgitate content from other sites to try and generate pageviews. Same thing on YouTube - any popular video is going to get copied to a zillion other "channels" by people hoping to ride the ad-serving gravy train.
Secondly, and which is actually firstly, advertisers got greedy and blew it with obnoxious ads. Pop ups, pop unders, auto-video, auto-sound, animation - all that Bravo Sierra just has to go. Some ad delivery systems are poorly disguised malware.
Lastly, there is a special place in hell for the person who came up with the advertising CAPTCHA. If I were to meet the person who came up with this, I would
literally kick them as hard as I could in the gonads. Repeatedly. Until I collapsed from exhaustion. Or ecstasy. Whichever comes second.