I made a contribution a while back:
http://forum.redump.org/topic/28470/add … t-edition/

Basically, by contributing some dumps.

PX-760A (+30), PX-W4824TA (+98), GSA-H42L (+667), GDR-8164B (+102), SH-D162D (+6), SOHD-167T (+12)

I think you need around 5 dumps to get dumper status.