Actually in one of their interviews after the acquisition Koum said that they still had every single penny of their VC money, they hadn't spent it. He even showed the bank statement showing it was all there before they took a second round of financing from Sequoia. Jim Goetz said they were the only startup we'd ever dealt with that was paying income tax before taking any money.

https://www.forbes.com/sites/parmyolson/2014/02/19/exclusive...