Disappointing. If this is because they were not getting enough donations from the users, then I am disappointed in us for not supporting them (I give $25 annually, maybe it is time to up that to $50). If they are getting enough in donations, but they just got a taste for money, then I am disappointed in them for compromising the spirit of open source (even if it adheres to the doctrine). If they are getting enough in…
Historically, the "spirit" of Open Source (or the motivation to part from the FSF, which was the birth of the movement) was to present whatever was happening in the Free Software world to businesses precisely with the goal of attracting money. Loads of it.
Open Source is a method of work. It says, my value is not in my source code, I'm not afraid of sharing it with the world (as a matter of facts, I get more value by doing so). But it is furthermost a methodology aimed at helping businesses make more money. (Or else all this commotion would've never happened in the late 90s and we'd all be still calling it Free Software).
Canonical is a business. It needs money and if you've ever owned a business, or worked in a financial position in one, you know there's no such thing as "getting enough". If they don't make money, they'll die and the project might terminate. Take it or leave it.
That being said, I chose to leave it a while back, for very similar reasons (I moved to Debian which was familiar and more ... free). But I cannot say I'm surprised they do similar deals, and cannot stand by when people accuse them of ... not following some convenient definition that was never there to begin with.