Anyone with a large sample post their "average player value" i.e. total money made divided by number of sign ups (i.e. everyone that has signed up now just the ones that have validated or passed the quiz e.t.c) At the moment mine is only $1.77 per player over a small sample of 90 players of course this value could go up as people are earning strategy points all the time and it would only take 1 player out of the 11 that have actually received the capital to hit the 5k mark to really skew the results.
With regards to the ID checks obviously it is to stop fraud but how effective is it? If i really really wanted to make loads of fake accounts i don't think the measures in place would stop me. However looking at my referral details and general opinion it seems to stop alot of genuine one account applicants.