By no means on the defensive for far too long, Zillow’s tactic, Brad Inman writes, is to safe its position as the major listing services and digitize almost everything — as the relaxation of the sector sputters. In no way undervalue Zillow.  Founders Prosperous Barton and Lloyd Frink are calculating, daring, crafty and opportunistic. They also play the prolonged sport nicely. They are at it once again. But initial.  Their failed iBuying experiment exhibits off their entrepreneurial superpowers. They had been all in and then suddenly all out, just before the dangerous pivot seriously wounded their corporation. The mark of gifted entrepreneurs is their skill to minimize merchandise — not…