Or on apps about snowboarding, or on fora related to snowboarding, or by paying snowboarding content creators, there's a wealth of opportunities out there. I don't give a damn about snowboarding when I'm browsing, say, twitter. (Which, incidentally, for some reason has borked itself into thinking I like rowing.)
Instead of that they want to shove their new snowboard ads on every blog not connected to snowboarding you see because you searched "snow" once on Google
Or because you just bought a new snowboard on-line (and won't need another for years), so now you've got snowboard ads everywhere, despite being in the group of people least likely to need a new snowboard anytime soon.
My shopping habits must be somewhat unique on a local amazon-esque site that 80% of the time when I view something I have already bought (i.e. to check some detail before it arrives, or sometimes if I want to order more - I buy a decent amount of hardware and fittings for DIY projects on there) it has a little carousel at the bottom saying "Others who looked at this item also looked at:" and it's a list of 8 things, 7 of which I know I've looked at recently, or even bought.