aab intentionally slow plays the bubble of krillroll which is also against the rules. Though, I guess aab does seals a service by creating less overlay.
Against what rules?
"A player shall not intentionally excessively stall his turn(s) in order to alter the game dynamic, especially in order to meet a deadline such as a bubble or rebuy period ending."
-taken from the FAQ page
Despite aab from probably being a bot, I have seen a lot of people do that.
It happens a lot even on stars, and I wonder how to the poker sites determine if it is intentional or just to get ITM.