AB2012: Advertising may be the life-blood of the web sure, but Google, Facebook, etc, (all advertising companies) "surveillance needs" are regularly inflated well above and beyond what's needed to keep websites alive via a functional advertising infrastructure.
Whilst I understand the greater implications to privacy and privacy concerns from market research, machine-learning algorithms clustering people based on their interests and even mere 1st party publisher based data through subscriptions, I think the content creators benefit directly from something as simple as people consenting to cookies or data management.
That part is a no-brainer. The website owner sells ad space to media companies that buy it to show adverts based to people with cookies that can be remotely targeted. Cookieless users are almost never targeted or shown adverts to because it's basically throwing away your digital media advertising budget - it's wholly ineffective to show teenagers Mercedes Benz ads. By not consenting, the publisher and content creator (with some cut) gets 0 revenue, and actually they are operating at a loss if everyone did it due to some running costs in hosting websites. It's the free rider problem all over again, like with piracy.
That's the whole point really - do you believe giving up your dummy email's interests and data for a dummy account is warranted enough to save some annoyance from 'targeted' ads on your fave websites, which other people are keeping running? I think everyone and their mother is jumping on this bandwagon about 3rd party cookies, without realising how creative content gets shown for free, so occassionally it's worth to slow down and think about whether the current trends are worth following.
Sure ads are annoying, but so is potentially losing the opportunity to enjoy creative content that you were interested in. Give them a break, throw them some money, it doesn't cost you anything materially speaking, not even your 'real' privacy.
About Google and digital advertising in general - let's clear a few things up, not for you necessarily as you seem well versed in this matter and have thought things through, but anyone else wondering about these things. Now, whilst Google is the biggest digital advertising platform out there, it's certainly not the only one and you don't have to go through them to buy ads, and give them their cut. They don't even touch many publishers basing their inventory on 1st party data - i.e. data they collected straight from users on their own website. Think about a website you frequently visit and log in to with some dummy email with fake personal info. Does Google get to sell ad space on that website? Nope. Let's say it's some news website - say... the Daily Telegraph to pick something popular. You consented to cookies or data management, and they tracked you clicking on an article about climate change. Congrats - you are now in the 'green politics' 'environment' and 'science' plus other interest segments. Do they have your name and address? Nope, of course not - they just think you're interested in these matters and think you might buy/subscribe to their client's goods or services, which is why they will pay to show you Eco-friendly renewable electricity bargains and deals from your local utility. But the Daily Telegraph as a publisher (or the company that owns them) sells that ad space through many buying platforms, Google owning just one of them, and they might not even use them at all. Plus, the news website retains most of the revenue - they just pay a fee to Google/other buying platforms, so allowing ads to be targeted at you still enables creative content and keeps the business floating.
Fast forward to Google specifically and how they operate - they have a ridiculous amount of user based data that they use algorithms on to categorise you in interest or data segments. This can be as benign as 'interested in cooking vids' to 'planning to spend 10k euros on renovating their kitchen Provence style in Finland, some specific city'. They do shit that will make heads spin. Ever noticed how something you talked to your girlfriend about purchasing is followed by seeing ads for that product around the Google-sphere, like Youtube and search engines? Hint - voice recognition in mobile phones whilst being logged into your Google account. It doesn't even have to know your Google search history, which is the simplest way to categorise you obviously. So I get the apprehension people have about Google, and I get your point that there is a difference between mere targeted advertising and giving up your personal habits to a mega corporation. But nevertheless, apart from mobile phones (which are very difficult to de-googlify and prevent tracking/targeting), using a dummy email or account to surf the web is rarely as harmful as people make it out to be.