One of the fundamental freedoms open source is being able to change to another supplier if the original one stops being useful - overcharging, acquired by a toxic owner, development terminated, and so on. Forgerock is a company that used the open source freedoms of Sun's identity management software to start a multi-million dollar business when Oracle tried to shut things down back in 2010.
Since then they've received many millions of VC dollars, relocated from Norway to California and hired hundreds of staff. That open source freedom has really paid off for them. But now Forgerock is apparently making sure no-one can do the same with its products, by making the open source code inaccessible except with a commercial support agreement. So the community wants to fork.