Honestly, at this stage, if it doesn't align directly with increasing the baseline on the short term, it's hard to see any sort of pledge from large companies as anything more than PR. Amazon backed out, but they could very well have done like the others and buy bullshit carbon offset credits - I guess the math on their tax deductions didn't work.
Assuming that we think within system, till incentives like punitive taxation are devised to force the hand of big corporations on that topic, nothing will change. But that won't happen because of lobbies and yaddi-yadda. And even if, I doubt if they wouldn't find ways around it.
So, yeah.