Popup appearing on thepiratebay.sx with Ghostery, but no popup without Ghostery

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pop-ups are disabled in my firefox preferences. enabling ghostery makes pop-ups happen at thepiratebay.sx. for example, search "how to grow anything", click the first result link, the page opens, but another pop-up window (or tab) opens that just says "Ghostery prevented a redirect from rotator.d1110e4.se to rotator.d1110e4.se, which is part of AdJuggler. [Always allow and reload.]". disable ghostery and try again, you will get no pop-up.