The vacuum problem... the issue is that it's kinda hit or miss to come up with items that are related to the vacuum and to do it over a time period.
I think if ads were smarter, you'd get ads for your vacuum's filter a few months after buying it and maybe replacement pieces just after warranty, but what do I know?
Best was when I kept seeing ads for a thing I was selling. I visited some big box sites about it to copy the specs on it.