Salesforce CEO Marc Benioff has spent millions of dollars quietly buying up roughly 600 acres of green landscapes in Waimea, Hawaii.Since the year 2000, a bigtime tech billionaire purchased at least 38 parcels of land in the small agricultural town on Hawaii’s Big Island, which boasts a population of less than 10,000. Inventory is already low in Waimea, so news of the real-estate purchases worried residents — many of which are Native Hawaiian — about rising housing costs and the loss of the tightknit commun ...