Amazon is lower than Google, FB, and Netflix, but still quite a bit higher than MS. According to levels.fyi for engineers all at the same level (~5ish YOE):
This is the middle to lower end of Amazon L5 comp for an SDE. I don’t know about the other companies - it might be mid to lower end for them as well or maybe high end depending on where they hire at.
LinkedIn is definitely higher (dunno about GitHub), but in almost every discussion I've seen about comps, LinkedIn is always talked about separately from MS. On levels.fyi, for example, LinkedIn is in it's own section separate from MS.
Highly debatable. While Amazon is more likely to be on the shit-list of Joe Public, in technical circles it comes down to AWS vs MS. Frankly if MS hadn't bought GitHub to distract magpie developers, there would be no contest.