Pretty self explanatory in the board description, but every once in a while Mike (the boss) will organize some flash sales of playing cards or playing card related merchandise such as T-Shirts. Often times, UC members get first dibs before he makes them available to non members. Such as the Venexiana Gold; we were able to reserve ours quite a while before the Kickstarter project had launched.
Or sometimes he finds a good deal on an overseas deck and orders in bulk and then distributes it.
That board can also be used to raise awareness of promo codes throughout various playing card retailers. But some retailers have their own boards to promote such a thing.