Your talking about advertisers who don't trust that their product's value speaks for itself and does the hard press.
Speaks to insecurity generally and is a bad way to sell thing unless it is something that is very time sensitive and requires this kind of quick sell : like a movie launch, a concert, an event for example.
I think part of the problem is, there isn't just one person/group on the other end of the wire: the guy designing and building the vacuum cleaner isn't the same guy trying to outwit your ad-blocker.
The vacuum cleaner guy wants increased sales, so he contracts with a marketer and/or advertiser, whose goal is not selling vacuum cleaners but rather simply getting people to either view, or click on, an ad, so he can show/tell the vacuum cleaner guy, "see, we got people to
see your vacuum cleaner, so you should (continue to) pay us".
The advertiser guy, in turn, is looking for websites (or networks of websites) that have viewers that they can get those ads in front of. If the websites can somehow show that their readers are more likely to spend money, or more closely fit some vacuum cleaner demographic, they like that because they might get more money per view/click, but, again, their goal is getting views, not selling vacuum cleaners. If they can engage in underhanded tactics to get more views/clicks, that
may seem entirely worthwhile
to the advertiser guy.
The website, in turn, doesn't care about vacuum cleaners, or much about the ad content (unless they get feedback that it annoys their readers so much that it starts lowering the number of visitors), they simply want to make enough off the ads they let through to make the site profitable (sure some of them are hoping for enough revenue to buy a yacht, but likely not most).
Each link in the chain is only concerned with its connections to the immediately adjacent links. The vacuum cleaner guy wants to sell more vacuums to customers, and the website wants to get money while not driving away significant numbers of viewers, but aside from that, none of them are paying much attention to the end user. The advertising guy, in the middle, doesn't have much reason to care about the end user, unless their tactics get so much negative publicity focused
on them that the vacuum cleaner guys (and other companies) decide to take their marketing dollars elsewhere. So, we get ... a lot of awful ads.
(All oversimplified of course, and sometimes advertiser guy is several levels of marketer/advertiser/ad-network, and sometimes the ads are carefully designed by the vacuum clearer guy's in-house marketing department.)
I don't mind ads that are an image that links to a website. Put up as many as you like - if I feel the distraction outweighs the value of your site to me, I'll go elsewhere. I do mind, however, reams of unvetted advertiser/ad-network javascript running in my browser.
If Apple can implement a mostly frictionless way to use micro-payments to content providers to bypass ads, I'm all for it.