True! A few months ago I wanted to install Aperture on a new laptop; since it's been pulled from the App store I couldn't find it anymore, and this is what customer support told me:
I've reviewed your request, but as much I would like to restore the item for you,
I won't be able to download "Aperture" to your account because the amount of time
that has passed since this purchase was made prohibits us from restoring it.
Goodbye App store.