As I had indicated in my original post there is a time to mess around for the extra year of service time, but I also indicated that because high draft picks do tend to make the big leagues at a pretty good rate the extra draft pick is worth more total service time. What the possible compensation does is my estimation is make the straight-up value of the two approaches close enough that you will end up factoring in other considerations before making the call-up. Like perceived chances of winning. For example a player like Taylor was when we finally called him up would have a very small chance of ROY, so trying to hold him for an extra year is potentially quite valuable, cheap effective utility types with options help fill the roster very economically. But your Braun, Fielder, types you give them a shot when they are ready and maybe build that good will to get all the things: Extra pick, immediate help for the team, good will leading to an early extension. Weimer, Felick, and Chourio for example I'd be worried about even in a smaller number of ABs them earning the year of service time anyway. Not that I can ballpark those odds but in a shorter span of ABs Frelick becomes more likely to hit for a silly batting average. Weimer could certainly have a great couple of months and hit a boatload of HRs before pitchers adjust.