Hi isaac
http://www.watchtower.org/e/statistics/worldwide_report.htm
http://www.watchtower.org/languages.htm
Well it is for Jehovah to judge if they are taking and doing his direction seriously but both these IMO show they are taking it seriously.
I see no others taking this preaching work as biblically seriously or taking on the responsibility of these people afterwards too.
Your right China and a few other very governmentally controlled countries severely curtailg witnesses but that is not our doing and You mi be surprised though about how much preaching work actually is done undercover in them.
We as witnesses take very seriously our right and command to do this God-given work as God's people.
2 Timothy 4:2
Preach the Word; be prepared in season and out of season; correct, rebuke and encourage—with great patience and careful instruction. 3 For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear.