i think there need to be include some condition for profit sharing. bcz at this moment i dont think follwers are using profit sharing . bcz spread commission is less costly than profit sharing.
so by applying some condition zulu can help good traders to get higher income i,e:
for live account signal provider with having more than certain amount (2000/5000) on his signal account will get only profit sharing option.
or if a live trader has less than certain amount than after maintaining certain return and drawdown they will be qualified for profit sharing.
bcz if it is only the choise on the investor i dont think any one will pick profit sharing as it cast al most double of pips commission for most of the signal provider