Unfortunately a lot of the AM Business class deals from YVR/SEA/etc. are only available from OTA. If you see a great fare on Amextravel, Chase, Expedia, etc, and try to buy it directly from AM, the price is often a lot more.

It sounds like there are other people in the same boat as me. I booked an AM flight from YVR to Colombia for next week through Amextravel. All four segments of my trip were cancelled by AM. When contacting Amextravel, I was told that AM policy is only to give vouchers for future travel, which I do not want, since fares through them are often not great. Even a voucher with Amextravel would be better. Reading through this thread and another here, it seems like my options are pretty bleak, given that I am not traveling through the US. Maybe attempt an Amex to Amextravel chargeback?