That's why Paypal offers you a payment link to service your customers as long as they click and pay...

One more Upsell idea for you... Offer them a Creative ongoing package of Optimized Content for their web business with a Free Google education package...

Included in the deal are the Domain names...

Outsource the content at very affordable rates, let say 3.50-6.00 or so an article...

Mark it up accordingly per Word... Lots of people/businesses do Very well Brokering Content & Articles anywhere from .10 to a $1. per word...

Of course you Do need paying customers so if they're problem customers in this case you may just want to Put up your own web site(s) on Their business with your domain names and Profit as the Competition using the same formula of Great Outsourced content...

There are always Creative ways and ideas to Solve problems and Keep the Cash flow going...

Phil