They were the market leader, with substantial revenue and lots of cash flow.
Why they didn't prioritize hiring some people and securing their platform is still beyond my understanding. It's up there with the $100+ billion in cash Apple is evidently not using to hire enough code reviewers or implement adequate security processes for their most important and sensitive code that supports their entire (massively profitable) business.
I really wonder where people's priorities are. They're not total morons; it must be an interesting reason why these circumstances happen. It's not hard to solve these problems with money - so there has to be a neat (if utterly dysfunctional) story behind it.
Seriously, guys. Spend $20 on a flu shot for your golden goose.