I think that "forever" takes optimism to new limits. Nothing is forever, and in the digital world you can multiply that by a factor of n. You only need to look back to the 1990's and the companies who were "big players" back in the day, but whose whose content has evaporated into the digital ether along with the companies themselves. PBase is not now and was not then some huge corporation with deep pockets; it's a couple of people who are mortal and yes, they may sell the business when they want to retire, but expecting the site to still be here for your great grandchildren? It's not impossible but I wouldn't put a lot of money on it.
That said, unlike some sites PBase doesn't seem to pull down the photos of dormant or defunct accounts. I still have a couple who have unfortunately passed on in my favourites. That makes it a heck of a lot closer to a "forever" account than sites which start sending out "PAY US OR WE'LL DELETE YOUR IMAGES! PAY US! PAY US! PAY US NOW!!!" e-mails every couple of days from the minute your payment expires until they
do delete your images. (Hi SmugMug!)
As far as an executor account goes, that's not a PBase thing, that's down to each individual. Passing on your logins and passwords (to all of your content, not just PBase) is something that should really be done as part of estate planning. It's an issue that has been around for a while now:
http://www.nytimes.com/2013/05/25/your- ... ml?mcubz=3If you make provision for your executor to be able to access your online accounts, they can handle continuing (or discontinuing) accounts like the PBase one without PBase needing to include secondary e-mail account access.