We gotta get this thing going soon before we lose complete interest. Instead of waiting for the 64 teams to fill again, set it up with buys for a few teams. Then the first 6 or 8 teams that lose can enter a second team within the pre set time period and fill out the 64 team bracket.
This way it gives the eager beavers a second chance. Just let the losers pick a second team in the order they lose/enter.
Almost guaranteed if you set up the brackets, owners will fill this thing up.