I've seen a few over the last two weeks, starbucks among them. Also, the loading seems REALLY slow at times on desktop, and not always when there's a ton of traffic.
I see a line down in lower right hand corner that says "loading data from px.moatads.com...." I sometimes seem to have the slow down associated with particular banner adds on the side, one in particular for a hockey game or jerseys, just kills it.