Was it the Bankroll Builder 500 B&R? If so, that’s a fairly widespread and effective strategy for said tournament. The idea behind it is to get into the post-rebuy period with a very large effective stack (in relation to the blinds) to allow normal play deeper into the tournament. Basically, during that early period, consider the BB to be “one rebuy”.
A thread regarding this strategy for the 500 B&R can be found here.