Thank you for the explanation. However I still cannot understand why this trick is a benefit. The only reasonable explanation for me is that this could potentially allow for trading with very high leverage (if all the pool's money is at your disposal), but this is for kamikaze I believe...
Can anyone explain me what is the advantage of trading at a prop shop, say, the same Coastal, instead of trading with a discount broker like IB? Also, I cannot understand what "locking depo for 1 year" means, could anyone elaborate on this?