The last time I was on Facebook (2015) I accidentally logged on without an ad-blocker. The best it could come up with was a package discount on gay scuba diving. I admit I was intrigued, but I did not click, simply because I could not discern what the product actually was.
Had a similar experience a few years ago. I cleared cookies and visited YouTube a couple days later. It showed me an advert for an oven starring Florence Henderson (Brady Bunch mom), who died not long afterwards. Google has all this data on me, but you take away their cookies once in a while, and they think you are a housewife.
My IP address is surprisingly stable. (Know this because I have to update a work app when it changes.) I'd logged into and used many google properties after I cleared cookies. What I searched for on Youtube was not oven or housewife related.
My guess is these targeters are maybe too sophisticated and rely on reams of data, social media logins, and etc. If you run a adblocker and clear cookies once in a while, you can "hide in plain sight".
People over attribute things to The Algorithm. In truth, with little information to go on, it's often the case that no valuable ad was available to be shown and so it falls back. It's not that it's oven or housewife related. It may even be a wholly untargeted ad.
The cynic in me wants to suggest that they noticed you cleared your cookies and deliberately served up a memorable-but-clearly-irrelevant ad to make you think that you had successfully fooled them.
Nope, couple activities for gay men only. Because men have a higher salary and gays probably have no kids. Now you have a high chance of big money target with a clear differentiator.
Maybe they are advertising that as a meeting / dating activity specifically. We've got lots of themed speed-dating events already which have the sexual orientation tacked onto them implicitly. You'd just expect the default for "gardening speed dating" to be straight.
