What's changed is that in the perception of the commenter he's not on a level playingfield to begin with and this announcement tilted it even further away from level. So in order to do what's in his power to re-adjust he takes away some of those profits.
Anyone not living and working in SV is not on a level playing field when it comes to startups. Either the service you use does it's job at a price that fits your cost structure or it doesn't.
