I've been eyeballing a lot of some specific SSDs, considering snagging them. I have not messaged the seller, marked it followed, or anything like that. I've just kept the page open in a tab and periodically refreshed the page. Now I am logged in mind you to eBay.
I just noticed now though that the seller sent ME an offer. How did they even know I was watching??? What's going on here?
eBay allows sellers to send offers to "interested buyers". My understanding of what eBay considers an "interested buyer" is either someone who has watched the item or someone who has viewed the item page multiple times.