Since we'd like to merge it soon, I did some digging in WF:

Glee:
media=tv;sex=f;age=13-17;age=18-34;eth=asian;hhi=0-30;aff=fashion;aff=teens;age=teen;aff=video;aff=communities

Assassin's Creed:
age=teen;age=yadult;esrb=mature;gnre=action;gnre=adventure;egnre=history;pform=pc;pform=ps3;pform=xbox360;sex=m;age=13-17;age=18-34;eth=asian;eth=hisp;kids=0-17;kids=13-17;hhi=0-30;hhi=30-60;hhi=60-100;edu=nocollege;aff=communities;aff=teens;aff=humor;aff=video;aff=reference;aff=photo;aff=adult;aff=tech

Warframe:
sex=m;age=under18;age=13-17;age=18-24;age=25-34;kids=no;hhi=0-50;eth=asian;eth=hisp;egnre=scifi;gnre=shooter;gnre=3rdpersonshooter;sub=alien

So the separator is ";" not "&" as far as I can see.