Is there a way for a US based BMI member to top of their account balances acquired via Hilton stays? I stay at Hiltons but most of my HH activity is via the Hilton AMEX so it might take a while to get a decent balance of BMI points just from Hilton stays. I don't think there are transfers available into BMI from AMEX or Diners so is there another way to build up points other than flying BMI or other Star Alliance members, Hilton or Hertz?