A worked example
Leader A opens 5 BTC long. Leader B, a mean-reversion trader, opens 4 BTC short an hour later. Mirrored into one account, your position is 1 BTC long. You have paid the taker fees for 9 BTC of trading and you hold the strategy of neither leader.
When leader B closes for a profit, your account gains nothing recognisable: the exit simply moves the net figure again. The outcome is not a blend of two strategies, it is a third strategy that nobody designed and nobody is monitoring.