Earlier quoted context omitted.
If the entire platform (gmail, etc) is funded by ads, then removing the ads destroys the platform. In that space, advertising is a necessary evil, and the best we can do it try to make it less onerous. But if you're supporting your platform by any other means, you can just go without ads entirely. And DeFi is all about finding ways to support things that you like without giving untrustworthy middle men like Google or…
Advertising clearly wont "go die in a fire", no matter how frictionless the payments are. There was a conversation on hacker news just a few days ago about 'smart' TVs all getting ads, spying on the user, etc. This is an example where people do have a way to pay for TVs (no need for microtransactions, TVs cost hundreds of dollars already!). But the TV makers have decided they can make more money by adding Ads, so why…
Consider gitcoin, for instance. Yeah, it processes payments, but more importantly it tracks developer reputation, user donations, and facilitates aggregate decision making (re: voting on how to spend the money).
Are you saying that eventually, the users will vote to have ads included in their open source software? I think not. It's only when somebody is able to exploit a privileged position as owner-of-the-medium that you get greed-driven service degradation like that. But we're learning how to build ownerless mediums. Whatever problems they have, I don't think they'll be the same-old middleman problems that we're used to.