It is a real account with real money.
And yes to put on a 10k position takes somewhere between $50 and $75 for the margin requirements. So that is certainly over 10% of account at the beginning of March. Even the pip spread of 3-4 pips is 1% of the account. And most rules of thumb say only risk 2% per trade. I assure you 2% risk is not happening here.
However, that total is not the amount risked, only the amount needed to place the trade.
The stop is much tighter most of the time. Obviously with an account that size the risk of blowing up is huge if margin and stops are not carefully used.
It's kind of a "take a trade to test the waters and see what happens" approach.
As far as scaling up, this is being done on a REAL MONEY account.
To do it of any "REAL SIZE" depends on how big the trader's "stones" are, if you know what I mean. That's where individual psychology comes in.
Some think it is easier to watch 5k of profits on a 1k account disappear than to watch 500k evaporate on a 100k account. Even though they are the same %, the latter would have a greater real world effect on most people's lives. But which is "better trading?"
Again, after a trade is profitable, some of that profit is risked on the next trades.
Playing with the "house's money", if you will.