If you are registered, you get access to the members only section, can participate in the buy & sell second hand forum and last but not least you can reserve your preferred username before someone else takes it.
FWIW and slightly off topic, I was using the fp L, the S9 and Leica CL in bright sunlight recently, I was surprised that the screen of the fp L was more useable than the S9, a more recent camera. I had a manual lens on the CL and screen turned off, only using the viewfinder, of course that worked best.
ps I love how compact the fp L is, noticeably smaller than the S9, but I'd also be interested in the evf for the fp L but they are ridiculously expensive