I'm seeing what appear to be commercial advertisements on the site which are not included in the roll of 2015 community promotion ads.
Is this a change or has the sales team succeeded to sign up paying clients for non-trilogy sites?
@robert's answer is correct, but I'd like to add a few things.
TL;DR: we opened up advertising to thirteen sites outside of the trilogy last year and this is one example. Nothing regarding high-rep privileges has changed.
Relevant question here: "What sites have advertisements enabled?"
Limited advertising has been available on some of the non-trilogy sites since last fall. See What sites have advertisements enabled? Danny Miller who wrote that reply is head of our ad sales. This might just be one of the first ads that's actually been bought on Ask Different, so there's nothing unusual here. Any products or services of interest to this site are all subject to our insanely strict no-distracting-content policies, so don't expect to see punch-the-monkey ads or scrolling television animations meandering across the screen
anytime soon… well, ever.