Seems to me that the
>(or credit cards are never charged)
option should work for you. Shows commitment on their part. You could keep everyone updated on the financial progress toward your goal via a "counter" on your web site, a periodic e-mail update/"prod" etc.
Regards. Al
"Violence is the last refuge of the incompetent." -- Isaac Asimov
"Never let your sense of morals prevent you from doing what is right." -- Isaac Asimov
Neither a despot, nor a doormat, be
Every app wants to be a database app when it grows up