It shouldn't last long, I hope - It's the second time I've had to remove all of her photos from the group because, essentially, they're all "for sale" type photos. She's selling things and using flickr as the place to host "product photos" (and subsequently it shows up in the feed here) to sell these things.
The MC flickr group has rules against this so I notified her they've been removed, pointed her back to the guidelines, and we'll have to see how long they remain in the feed here.
It's possible it might remain until someone else adds a photo to the MC group to replace the most recent (but removed) photo. Larry would have to answer that.
I suppose, if nobody has a photo to contribute this afternoon to the group - I'll see if I can't find something to replace that one.