Yeah I worked in FAANG when we got the advance notice of a number of CVEs. Personally I think it's shady, I don't care how big Amazon or Google is, they shouldn't get special privileges because they are a large corporation.
I don't think the rationale is that they are a large corporation or have lots of money. It's that they have many, many, many more users that would be affected than most companies have.
I imagine they also have significant resources to contribute to dealing with breaches - eg, analysing past cookouts by the bad actor, designing mitigations, etc.
