I might be wrong but I thought once you logged into watch your game then you get the 8% bonus possession whether you watched the whole game or immediately logged out again ? So surely watching till half-time then leaving would make no difference than if you'd watched the entire game ?
I often don't log into my game until around the 55th minute then watch to the end so I have time to make adjustments.
FC Loella. Server 121. Level 17
11 League Titles
2 Champions Leagues