Oculus never took off. The other two you mentioned were already vastly popular (Whatsapp was the most popular thing in the EU back then, now taken over in part

Oculus never took off. The other two you mentioned were already vastly popular (Whatsapp was the most popular thing in the EU back then, now taken over in part by Telegram.) The purchases were made not out of a grand vision for the future, but simply to hinder and squash competition. The internal emails that have leaked from the company over time show as much.