For a couple of weeks, when I load the Hilton forum page for the first time each day, I almost (but not quite) always get a popover ad inviting me to join IHG Rewards Club. I thought maybe it happened for the first forum I loaded in the day, so today I changed the order, and the IHG ad still appeared when I loaded the Hilton forum. It's annoying, but at least it goes away when I reload the page.