Ben Brooks:

Twitter has turned it’s back on the very users that not only made the service popular, but that came up with the very features that Twitter is now using to try and profit from. And that bugs me.In my mind Twitter took the easy way out: venture capital and eventually paying that money back by slapping ads everywhere.

I don’t think anyone minds that Twitter makes money, but do it respectfully and don’t screw your users and developers along the way.