Honestly I disagree. Being "sold" an idea is just a metaphor we get from the same place as the "marketplace of ideas", and it's not accurate. There's no transaction here, it's a copy operation. You're being offered an idea and you can adopt it or not. You don't have to give anything up for it.

Personally I'm adopting this idea because it gave me a new feeling of how mentally peaceful a post capitalist world would be. You can already get a taste of the difference no advertising makes by going online with an adblocker. The last time youtube broke through my adblocker it was such an intrusive feeling and I put a lot of effort into making sure it wouldn't happen again.