You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
In extreme cases they have been know to refund the amount to the lucky referrer if the total they have built up is too high to use in a reasonable amount of time.
It's your money once it's in your account so you can certainly ask for it. When I changed to paying total monthly bills by variable DD instead of a fixed averaged DD (which always ends up with a surplus) I asked for all my account money to be returned to me (which included some referral money).