@spunoutofcontrol howdy! one of the biggest benefits in my eyes, is not having to stress out about obtaining anything. life's short and i only have so much time per day to spend on this obsession (stupid other obligations!), so not having to have to watch the website like a hawk and have peace of mind is worth a lot lot lot to me. this was a giant help for me recently with Godzilla, as Im in the USA and that release wasn't available to be sold to USA directly, so i did not have to worry about "how do i go about obtaining this", and knew id get it. another huge benefit is the early purchase opportunity for whichever items Spencer decides to give subbers a crack at first online (cat in the brain flexi is a recent example). then you get all the rest of the bells and whistles such as lithographs, digital downloads, a sub exclusive single (such as the halloween 3 theme flexi in years past), sub exclusive vinyl variant,a discount code to use on the website (12% off every purchase), not to mention anything else that spencer may decide to throw in!
i recommend it!
there is also a back2black sub available which drops many of the bells and whistles and still gets you every release and is significantly more affordable if wanted to investigate that route as well.