Clearly you have no idea how the Web works
I am a web application developer. In addition to that I maintain 50+ servers. Including web application servers, HTTP servers, proxies, DNS servers. May I suggest to you to not buy lottery?
No, you're wrong, they will never do that - it will cost them in server hardware and bandwidth to host all that advertising. It would create massive logistical issues with advertiser billing
At the worst case the bandwidth cost will be doubled. This will be a setback for everybody (including visitors), except infrastructure firms. But this will not stop the transition, I know very well the network traffic prices. I am sure Google and others will do everything to make the whole thing technically the easiest. The smallest sites wiill quit. Other small sites may need to move to a CDN or PaaS like service. It might be possible that they have to select a single ad company. This strong dependency will make them weak, large ad companies become even stronger.
not to mention new vectors for click fraud
If this will be the case, then again, this will be a problem for the small sites, which do not bring enough profit for the ad firms to justify the larger costs of auditing.
The whole ad-blocking movement is as counterproductive as it can be. I can consider it as a demonstration, but than again it would be worthwhile only if people were prepared to pay for content. But they are not. The best example is Flattr. Almost nobody use it, even though it is mostly targeted to technical people and it is a very easy and cheap way to support for example the open source products you use.