It still qualifies as community driven since they have no financial incentive to keep maintain their version of the distribution, but they would certainly be affected by the upstream messing with how the source is provided. What they could ultimately do would be “hard forking”, i.e. taking the available state of the original project and keep developing their own version on top without ever keeping in sync with, say, Ubuntu anymore. Instead they will become their own thing that at some point will have strayed from the original significantly enough to be fundamentally different in their packages, configurations, repositories, etc.