AFAIK international partners don't sell "basic" fares for domestic AA flights, just AA does, and they publish precisely the types of warnings that I advocate. As does BA for their HBO fares. And neither cross-sells to the other as a "business fare." You seem to forget we are talking about several thousand dollar minimum business class fares here...

Further, under "flight details" it is almost universally disclosed what meal service is going to be offered (Dinner, lunch, "meal", snack...). Lounge access on international flights of any sort (such as we're discussing here) always include lounge access... so again domestic matters are somewhat irrelevant to the original discussion. Many countries no longer even offer domestic business (apart from the US most I travel do NOT) so that's another red herring.

It's clear to me that you've totally missed the point that the OP is being subjected to $800 in charges that, if it were anything else on any other partner, most would expect to be more transparent.