> These new, mostly consumer use cases have helped us uncover unforeseen issues with our platform. Dedicated journalists and security researchers have also helped to identify pre-existing ones.
I don't think he is saying that these issues have to do with scaling problems, but rather that the increased usage + new types of usages led to increased scrutiny and uncovered new issues. Which is correct in a way.
Obviously, they were told several issues in the past too, but then those issues were not costing them money. Now they are, so they are trying to fix them.