This week we continue our special five episode series on The Information 50, our annual list of the most promising startups valued at less than $1 billion. In episode two, executive editor Amir Efrati first talks to reporter Malique Morris about commerce startups worth watching, including a budding rival to Shopify, a fashion marketplace and a facilitator of limited-edition merchandise “drops” for celebrities and shows such as “Succession." Next, Malique talks to Rachel Tipograph, founder and CEO of MikMak, an advertising-tech provider for consumer brands, which could be a beneficiary of Apple’s restrictions on iPhone advertisers.