The growth of online marketplaces like Uber, Airbnb and Amazon can sometimes threaten local businesses such as taxis, hotels and retail shops by taking away jobs or reducing income to the community. But it doesn't have to be this way, says strategy consultant Amane Dannouni. Pointing to examples like Gojek (Indonesia's Uber for motorbikes) and Jumia (Africa's version of Amazon), he explains how some online marketplaces make deliberate trade-offs to include, rather than replace, existing players in local economies -- benefiting everyone in the long run.