How quaint. The MEK (Iranian People's Mudjahheddin) were designated as a terrorist organization but collected money in EU streets all the time. Now they are useful against Khamenei.
The US would also like to use the equivalent of the PKK in the large Kurdish part of Iran against Khamenei.
Nothing to say of using the PKK rebranding of SDF in Syria as well as receiving "global terrorist" Al Jolani in the White House.
US cynically removed them from the Terrorists list in 2012.
MEK is probably just 300 really old guys now, they have strict rules against marrying outside the org.