From the Forbes article:
According to Orion Hindawi, the company has been cash flow positive every quarter since 2012, and hasn’t needed funding. But they’ve taken it anyway: $262 million total in just over a year, including $142 million exclusively from Andreessen Horowitz over the prior two rounds last August and this March. Orion says the goal of this latest round is to put an end to fundraising for the foreseeable future.
“The reason I need this money is so I can stop raising money and go work on my product,” he told Forbes. “There a pernicious cycle in the Valley where everyone is raising money. We wanted to do it big enough so that we don’t have to think about it anymore.”