kcat,
You can also try
www.abbilling.com or
www.adultbouncer.com
They are kind of AVS program just like the one you use. But they also provide their own server for you to use free with unlimited bandwidth and storage. Their service charge is reasonable. You can take a look at them. abbilling and adultbouncer are operated by the same people but packaged differently for different webmaster's needs. I think you should look at them.