I get these emails all the time too. I don't mind getting an alert when something on my watchlist has dropped in price, but it's annoying when they send you alerts for an item you clicked on once (usually just to view why it's so overpriced ).
I like the "frequently bought together" ads they display near the bottom of a listing. Just so happens that the coin Im looking it is frquently purchased with 2 others just like it.
I took it as sarcasm like if someone says "Happy Tax Day" to you when you are forced to mail a large check to the IRS.