Folks who are aware of racism and ableism in the Fediverse will also be familiar with this concept.
The reasons could be for anything. A love for friends or folks they look up to.
A fear that Free Software will die without Stallman and whichever hand picked protegee he selects.
But the truth is the Free Software Movement wasn't directly disseminated from Stallman. People brought us into this movement, just like others and Stallman's behaviour pushed folks out.