There's an ulterior motive behind it, and it's not to help their fellow man.
REAL Community service now allowed?
As far as I understand, JWs in Russia do some perfunctory charity work once per year - typically cleaning some public area like a park or the streets - because they're required by Russian law to do so in order to remain qualified as an approved religion or charity in Russia. So this is not something they're doing voluntarily out of the goodness of their hearts. It's something they're legally obligated to do in Russia.
I wish more countries would do this!
Nice avatar. Powder blue tang I do believe.