A couple of questions about flying international long haul on AF. I am a lowly Silver medallion member.

1. On a 3-cabin aircraft, if I buy a business ticket, is there any possibility of an upgrade to first (La Premiere) class? I know AF doesn't release it's F inventory for a direct award redemption but wasn't sure if this applies to upgrades as well, particularly if F is empty on that particular flight.

2. I assume I earn DL miles for the flight. Are there any class of service bonuses for flying J? If I were to get upgraded to F, does the F class of service bonus still apply? And I assume I can 'stack' my Silver + class of service bonuses?

Thanks!