For privacy reasons I'm looking for a provider that accepts American Express. Does anyone know of any?

Cold hard cash - now that's untraceable.  An AMEX charge leaves a receipt, a statement at the end of the month, and a year end summary.  How exactly were you going to explain the $400 charge to Platinum Entertainment?

it does business with.  But again, why?

they are few and far between.

... We can break down the session for you to include separate charges for GFE and, new for us, Greek!  We even have a categories for ROB & TOFTT  so you can keep track of your bad Hobby expenses which we can lay out for you in a pie chart if you wish....

But DH sez if you are juggling finances this way (been there done that) its time to step off and reevaluate.
 -- Deep 'whats in your wallet' Heat

It's the only card I have that the wife doesn't know about. That is who I need privacy from. Ha!