For us non-JWs, can you quickly clarify the levels of service (pioneer, auxil., publisher, etc.)? What are the hour requirements?
Special Pioneer over 100 hours per month (HPM)
Regular Pioneer over 70 HPM (no letter written if above 800 for the year )
Auxiliary over 50 per month
How does it relate to whether one is baptized or not?Must be baptised minimum for one year to be a regular pioneer , can aux pioneer straight away the next month upon being baptised. If reproved or reinstated, unable to aux pio for 1 year.
Does it matter that the early church had no organizational clock punching, stats, etc.?
No - it doesn't matter (though a recent drama had the 1st century "service overseer" reviewing the congregations activities and a recent dvd had a picture of the early Christians going door to door with scrolls , since corrected in the Watchtower).
It seems like an accountability or sales technique, not NT discipleship/evangelism.
True to an extent , though some ( a minority) of sincere JWs do see it as a Christian vocation. The system tends to focus attention on the number of hours performed , rather than any meaningful success or otherwise of the activity. As it is a self-certified system with penalties for underperforming , especially for appointed men , many JWs exaggerate hours and many more count string out the time by having extended tea breaks or have often bizarre methods of boosting time (such as driving past a call known not to be in order to "start their time".) A popular method is the so-called "pioneer plod" , where a couple of pioneers walk extremely slowly between calls in order to boost their time.