Yes, that is a system sold on Ebay, that someone on here told me about.
It is supposed to exploit a loophole in the 5CC odds.
It will actually be a heavy loser as there is no opportunity to trade out when the unstood player hits a charlie; and backing in R3 in case the dealer hits a charlie simply reduces any recovery profits. The only hope of real profit is if the dealer goes on to make 5 cards after the back bet on the charlie in R3, but this won't occur often enough.
There just aren't any mistakes in the odds offered by Betfair.
I wrote it up in a trigger, but there are certainly no guarantees.
I hope you didn't pay very much for it.