According to the jazz.net releases page (e.g.
https://jazz.net/downloads/rational-team-concert/releases/3.0.1.2 ):

----------
Mixing Developer 10 Free or Developer for Workgroups licences with
Developer or Developer for IBM Enterprise Platform licenses on the same
server will result in Distributed Source Control and High Availability
capabilities being disabled for all licenses on that server. Mixing
Developer 10 Free licenses with other licenses on the same server
results in the entire server being eligible for only Jazz.net community
support.
-----------

So you can purchase an 11'th user and keep using your 10 free, but you'd
only be entitled to community support, and you couldn't use Distributed
Source Control or High Availability capabilities.

Cheers,
Geoff

On 1/25/2012 12:23 PM, kesterto wrote:

Hi

I am trying to track down what happens if you use the
10-free-developer CAL on RTC and then want an 11th user. What kind
of CAL should we buy - eg: could we buy an floating Developer CAL and
add it to the 10 licenses we have already? As soon as we move to the
11th user - do we need to buy 11 licenses or are ts 10 free licenses
are still valid?

thanks

anthony