As a user I hate ads (or how they are displayed) but I'm interested hearing about a new restaurant opening nearby, new groceries being sold, new computer hardware etc. New restaurants tend to be advertised before movies at the cinema here, or I have to walk around to see if there is one. New groceries tend to be aired on TV or posters inside the grocery store. New computer hardware tends to be reported by tech news.

A central place for new products largely driven by a community + pay to keep ads up longer (or something) would probably be one of those websites I'd go to for my daily product news.