I got redirected to a full-screen video ad/site/webpage for Mobile Dates just now. I have a bookmark set to the "New Posts" link, so my first entry into the site is always the New Posts view. It caught me before the FC page came up, and has not happened again in my browsing, similar to others' experience.
I've been involved in internet tech for 20 years... I'm doubting that this is a Google Ads problem. Mostly I say that because is anyone seeing actual AFF Google Ads on the site? I have NEVER experienced this on ANY other forums/site of even a "mature adult conversations" nature, that runs Google Ads. Ever. I think there's definitely malicious software on the server. I say this mainly because the probability that we are all experiencing the same botnot or Trojan exploit is too small to countenance, and because we all are seeing the same thing, even though our internet browsing histories are different... so even if some of the users ARE being fed ads by Google based on their browsing, I, for example, have site tracking completely disabled, and cookies set for me to have to turn them on explicitly, manually, and by domain to even enable them. Even if I spent 3 hours a day on AFF (which I don't, I've never been there in my life), there would be zero record of that on my computer, and nothing for Google to justify throwing me that ad, really.
I am not sure your server techs are being forthcoming. Anytime you hear something called "toolkit", it smacks of a server-side trojan...