When you rely on one company to handle all of your billing you are going to run into issues like this. Using a cascading software with multiple integrated processors can save you sales in these type of situations. If a processor in your cascade is down, you can quickly replace with any other processor that is part of your cascade!
NATS has over 80 integrated payment platforms so you can even increase the amount of sign-ups by offering different payment methods such as localized billing, mobile, etc.
You will also have the ability to use features such as geo-targeting cascades or adding random weights to spread your transactions across multiple payment processors and much more.
You can view some more information on how our cascade system work by going to:
http://wiki.toomuchmedia.com/index.php/NATS4_Cascade
Don't be limited by your back-end, lets talk about getting set up with NATS!