Pinterest climbed more than 4% after trading last night on Wall Street following the announcement of a change of CEO. Ben Silbermann, 39, co-founder and general manager of the social network, therefore leaves the management and gives way to a veteran of Google and PayPal, Bill Ready. This movement could signal a strategic shift towards e-commerce, note some specialists. Silbermann will become executive chairman and retain a seat on the San Francisco platform's board of directors. Ready will also join the board. During Silbermann's reign, Pinterest grew to become a social media juggernaut with more than 430 million users and annual revenue of more than $2.5 billion. Ready, for his part, has just spent two years managing commerce and payments at Google (Alphabet). The 42-year-old new executive also spent years at PayPal. He says the next chapter should help 'pinners' (network users) to buy, try and take action in a number of areas.