Question about Sims 3 rigs.

I still play sims 3, I know that you have ended support for it, I had some questions on the rigs. I'm still new to using Blender, I noticed that there are alot of bones in the rig that don't affect the mesh I was wondering if it is possible to make these bones work with the sim mesh and show up in animations or even create new bones that can be used to deform other parts of the mesh as well. I was also wondering if the rigs that you have for sims 3 were directly extracted from the game and if so how?

Will you guys ever reconsider ending your support of the Sims 3? There are still people who play sims 3 and it would be nice to have a sims 3 studio if that is possible and not asking too much of you.