IBAs is a total joke. It isn't desirable to see them, since they perform several things that annoy users:
1) they follow user across sites
2) they may present something to a user that user does not want, and that I as site owner do NOT allow. Example: I can guarantee you your site will be flooded with election propaganda next time there's an election. I also saw christian hate ads (i.e. sites pretend to be christian that are crypto- you know who).
3) Some of us actually built sites on topics and want on-topic ads show up.
4) Makes blocking particular site ads irrelevant, as similar ads may reappear in droves for particular users
5) I don't want "shopper brainwashing" ads on my sites. THE WEB IS NOT ONE PERPETUAL SHOPPING MALL (you KNOW who you are who runs these).
So, that, comparing with the fact that google owns CIA asset company Keyhole - and I have 0 trust in them using user data RELIABLY. That, and also I've been tricked by google's employee into changing ad formats on our site (apparently for more income) - there's no more income, but site is now flooded with IBAs. It seems that they don't have these for all ad formats.
As a publisher, I WANT a total control over these, so it means ability to turn them on/off, possibly on each channel. That should be an option provided to publishers IMMEDIATELY.