Wouldn't a slow boil have been better than a massive price hike? Raising the price by 50% would be palatable to most medium to large orgs as the cost to switch is greater. And it would still net a nice chunk of change for Broadcom.
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AWS overcharges for traffic, specially traffic going out.
However, they have repeatedly released instances that are cheaper than their predecessors (often, higher performing too). I don't think that's out of the goodness of their hearts, as it likely allows them to refresh their fleet more often than it would be the case otherwise.
If you are large they will work with you on pretty sweet discounts.
So far, there's been no indications that they will pull the same move. They might, but that would be surprising. VMWare has never been cheap though.