Info Cards is a format with maximum concentration of facts. In such a publication everything is briefly and clearly sliced and diced. The ideal volume — 4–6 thousand characters.
Shortly answer the questions a friend would ask you over a mug of beer in a bar. When you're preparing the article, it is better to do literally the same: take a friends, buy them a Guinness and talk about the topic in detail. The questions your friends will ask — even minor ones — are exactly what you need.
Go from general to special questions.
Who is Elon Musk in general?
American engineer, entrepreneur, inventor and investor; dollar billionaire. Created companies such as PayPal, SpaceX and Tesla.
What happened to PayPal, why isn't Musk there anymore?
Originally, Elon was one of the founders of X.com which (like PayPal) handled money transfers. Then there was the merger of X.com and PayPal and an IPO. Musk owned 11.7% of the shares, so when eBay bought PayPal, Elon had $180 million to grow the business he really dreamed about.