Just got this as well. Honestly, about the whole lifetime subscription thing, I have contrasting feeling, but what I basically believe is that having lifetime access to everything Steve does and will do is already great: I don't mind to add some contribution here and there to keep him funded... if we were in better financial conditions I would have proposed a fixed monthly contribution to Steve because it'd feel just about right... not excluding that we'll decide that in the future.
Keep up the good work
Pino
P.S.: I see you work in Softimage. It'd be great to have the original Softimage files to add Root Motion ourselves for Mecanim