I 'joined' MyUS.com in 2012, and never actually used it, although they emailed me frequently to encourage me to do so. As far as I can tell, the last I heard from them was in November 2013 (I think I sent them an UNSUBCRIBE message).
Now, I've notice that my last 2 AMEX Statements have had a $US7 debit to "ACCESS USA Shipping Acct Sarasota" - which turns out to be "MyUS.com."
I am concerned, of course, but also puzzled that they and AMEX have assumed that I authorised this payment? Interestingly, it's billed to an AMEX card I didn't have when I first signed up with MyUS.com.
Looks like I'll have to go through the same process as others to disengage; any hints gratefully received.