Judging by the math you do not know the difference between a round trip and a contract traded.
If according to you each trader is "banging out" 5k r/t's a day and there are 10 traders then:
5000 x 2 =10,000(lots per day)
10,000 x 10(traders) = 100,000
100,000 x 20(trading days) = 2,000,000(lots per month)
Then you say that could be reduced to 2500 r/ts - your post does not make any sense.
Basically instead of picking holes (and getting it wrong) in what is an impressive start up volume you should be congratulating them.
Furthermore the likeliness of 10 traders in 1 office all doing the identical volume is absurd,on that I have to question your experience.