I'm not sure, but I believe Whatsapp was profitable prior to its FB acquisition. They used to charge about $1/yr before acquisition and had over 500mm users. A

I'm not sure, but I believe Whatsapp was profitable prior to its FB acquisition. They used to charge about $1/yr before acquisition and had over 500mm users. And I think they had fewer than 30 employees. So they were bringing in about $500mm/yr and their infrastructure costs were unlikely to have been in the 100s of millions.