No changes to speak of. I have a FB account and added it to the KLM app, but I know for sure that my DL SM account was still attached because my Silver STE status was still reflected on the boarding pass as DL Silver with the appropriate group, in addition to letting me select exit row seats for free
Doesn't mean it didn't post to FB as zero credit. Never open in AF/KL app while logged in, otherwise itll credit to FB. You canbhave mire than one FF in reservation. Thus why itll still show status, etc..