Annoyingly thay do not always give much notice of them. I would imagine a new cache would give them a money boost with people after fresh loot. An empowerment weekend should do the same, but marketing is erm not the Funcom way
Well in last nights SWL live stream, we found out that this is actually not from a new cache.
It is from a Limited time 12 month Patron bundle, available for steam and none-steam clients for £99.
As well as the men in black themed outfits, there is a Gadget that on None Boss Mobs, will reset the Agro, handy for getting rid of that mob you just did not feel like dealing with.