Comment by gosub100
It's probably the result of some very backward-thinking rationale: "If we get hacked by the bad guys, our shareholders will point to these bounties and say 'wait, you're activetly paying people to hack you and now they did and you're going to have to write down and additional $X Million?'. " Execs afraid of having egg on their face, perhaps.
It’s probably more in line with “no one reported any bugs so probably there aren’t any”.