Ext JS licensing - BE EXTRA CAREFUL!

It looks like the licensing terms for Ext JS library (as stated in an email conversation with Ted Driscoll) are for developers and for the once you bought is only. There would be nothing unusual about this but you have to understand that if a developer leaves the company then he TAKES THIS LICENSE WITH HIM and in best case scenario you're around $329 lighter if you hire a new developer.

Here's the conversation I've had with the said VP:

Me

I'd like to buy 2 ExtJS licenses for developers in my team. There is however a
question of what will happen if a developer leaves the team and someone new is
hired? Will the license stay with the team or with it move away with the developer?

Ted Driscoll

The license is assigned to a specific user, so you can not move them.  
they are not floating.  Hope this helps

Me

Does this mean that when a developer leaves the company he leaves with the
license?

Ted Driscoll

No,  but no one else can use that license.  Now having said that, if you ask
once, we will allow it, but if this happens more then one ,then we will not.
Our licenses is are per named developer

Like I said - you need to know what you're getting into. Ext JS is a fantastic library but the licensing terms are just cruel for companies willing to make software with it. Especially in today's world where developers are changing jobs often which is not only normal but also desired to attain high technical skills.