recommending one specific action definitely has a force since its easy to understand and do. if its too close to the end however and many people forget they won't be able to do it after it closes!
i think we need more of a guide which details the good value of pledging and the value of upgrading, especially to people going;
from nothing to digital copy
from digital to physical
$29 for digital AAA game is great value
$60 is basically the normal price for any game pre-order but you are getting the limited edition instead, which is great value.
you also don't want people withholding their pledges/upgrades for the final day and then forgetting. if there is going to be one specific pledging or upgrade event it needs to be at least 24 hours before it ends.
withholding pledges until a specific date also has the effect of slowing down the kickstarter in the days preceding it.
edit:
the general attitude should be; "these last 3 days are going to be the 'the final blow' to the kickstarter, we are really going to try and make a dent in that 10 million goal. We might not make it, but this is going to be one of the greatest final pushes in kickstater history! lets make shenmue 3 the biggest kickstarter funded game ever!"