No it's not "Okay" because you should never have been lead down this cul-de-sac in the first place. The PiStore died in January 2015 and folks are still trying to access that sad and dead place. That really annoys me because it should have been torn out of the net when it died.
expires on July 06, 2016, that should help make it die.
should have a huge notice "THIS WEBSITE IS DEAD"
on it. Or if that isn't possible a re-direct to http://raspberrypi.org
to a notice that also says "The PiStore is dead" and not written in black letters on a black background.