Technically I guess this might be site-specific (so migrate if needed), but as the official announcement on ads says the following, I'm reporting it here for the time being1. Additionally, the way I understand it, this ad could be triggered anywhere on the network.
If you see any ads that are inappropriate or have any questions about this experiment, please let me know by starting a new question and tagging it with advertising.
I just witnessed this ad on the Workplace:
https://google-bidout-d.openx.net/w/1.0/rc?ts=2DAABBgABAAECAAIBAAsAAgAAAfEcGApJMHV0RElGdVEzHBaMqvq5xZqR17IBFuuLvKGkrvnK0wEAHBaTx72i0bCsyfgBFo3r1NOzl8mt7wEAFpaNk9gLFQYALBwVAgAcFQIAHBUCAAAcJrrv5YMEFQQVBCa47-WDBBbsy9WDBNaaARaaARaaARZkFmQWZBZkFsIBABwcLBaAsYqku-yDrSoW67K12efigOelAQAAFpTZmIAEFoC9m4AEFryx3oMEFqax3oMEFRgcFPQDFNgEABUEJsIBFsIBFsIBETUOACwsFsv6va627-DxMha3tNid58LglfABABaWjZPYCwYolNmYgAQWgL2bgAQWprHegwQWvLHegwQYFFNxS2YySG9CaHZ2dVFUbVdJUG40JsIBJQQWKBgHYWRwaWxvdBUClqrAhQMRERgCT1gMehT4AxTeBAAoA3J0YoEADDwYb2h0dHA6Ly9ncmVlbi5lcm5lLmNvL29wZW54L25vdGlmeT9pZD1oekg1bDR1XzU1R3g2cjVtS1owOEhKZ2thd1JQdXpZY3k0NFhDV1BEZEpVZmxFcVBNQ0pnaGcmd3A9JHtBVUNUSU9OX1BSSUNFfSg1c3RhcmJvZHlwb3NpdGl2ZS5ldUB0cmVuZC1jaGFzZXIuY29tQGNhbm9vZGxlc291cC5jb20AAAA&r=https://green.erne.co/clicks?id=hzH5l4u_55Gx6r5mKZ08HJgkawRPuzYcy44XCWPDdJUflEqPMCJghg&url=https%3A%2F%2Ffr.starbodypositive.eu%2F%3Faid%3D1307%26ac%3D-lESO7p6FY92JiaiixhDC-openx%26rh%3Dworkplace.stackexchange.com%26cid%3DSqKf2HoBhvvuQTmWIPn4%26cp%3D20190918_seMC26sVAdIpRl749ZiR
As one can guess even without speaking any French, it's some "doctors say this weight loss method is amazing" pile of crap (plus, it's animated). Can it please be removed?
Just got one more, on ELU, Travel and the Workplace. It appears to be from the same site. Is there more to it or should I just blame caching?
https://google-bidout-d.openx.net/w/1.0/rc?ts=2DAABBgABAAECAAIBAAsAAgAAAdUcGApUbVlMWXZheE1LHBbj9aWt2ZuH42cW08-nu4D4i8b6AQAcFq6Yov7e_YKWIBbb2Zv5teeWrbcBABb0h5XYCxUGACwcFQIAHBUCABwVAgAAHCa67-WDBBUEFQQmuO_lgwQW7MvVgwTWZBZkFmQWZBZkFmQWZBZ0ABwcLBaAsYqku-yDrSoW67K12efigOelAQAAFpTZmIAEFoC9m4AEFryx3oMEFqax3oMEFRgcFPQDFNgEABUEJnQWdBZ0ETUOACwsFrvivfX084LKkQEW0ZD8qoG8sJ6nAQAW9IeV2AsGKJTZmIAEFoC9m4AEFqax3oMEFryx3oMEGBRFSXduU2VqeURNVEdSaGlXMWg3WiZ0JQQWEBgHYWRwaWxvdBUClqrAhQMRERgCT1gMehT4AxTeBAAoA3J0YoEADDwYb2h0dHA6Ly9ncmVlbi5lcm5lLmNvL29wZW54L25vdGlmeT9pZD1pZXExNzhPTk1RZ2QzX0tDR2RZb3UyZUt3QjlyQ1JUOU1CSTZleENtLXdCOXJsVlZNZDRYSmcmd3A9JHtBVUNUSU9OX1BSSUNFfSgic3RhcmJvZHlwb3NpdGl2ZS5ldUBnaXZlaXRsb3ZlLmNvbQAAAA&r=https://green.erne.co/clicks?id=ieq178ONMQgd3_KCGdYou2eKwB9rCRT9MBI6exCm-wB9rlVVMd4XJg&url=https%3A%2F%2Ffr.starbodypositive.eu%2F%3Faid%3D1307%26ac%3D-UJYSzt34tKODRcAy2eto-openx%26rh%3Denglish.stackexchange.com%26cid%3DEIwnSejyDMTGRhiW1h7Z%26cp%3D20190918_KFaOw50xGiJfhmK5Eu9I
1 I don't have an account on The Workplace, and would rather not create one for a single meta post.