I like these additions to ad serving entities, this is an important development. I'm really surprised I was not informed about these ad transparency portals, and that nobody seems to be paying attention to these. I would have wagered there would be various activists using this tool already. None of my news channels have this on their radar.
Does anybody know of other ad transparency portals, or of any projects working with these portals? Whats the likelyhood that these portals vanish into nothing, or behind a paywall or whatever? Are there APIs?