In a company like this, the fact that they use data to earn more than normal is a lack of professional ethics. I'm sure Google is doing very well and is profitable, but sometimes people don't measure up in the workplace and mess things up like this. Besides having stolen, it's a total disgrace as professionals. Sometimes people are only interested in money, even if it means getting their hands dirty. It's a shame.
I mean... It is pretty obvious the person who betted on that market using his privileged information as engineer on Google did not have any intention to get caught red-handed, he knew pretty well he was committing a crime and he intended to conceal it the best he could.
After this incident, I am sure Google and other big tech companies will have some talk to their highest ranking employees about the use of their privileged information and the possible consequences of engaging in betting markets.
The popularity of these markets is relatively new and it makes sense there are people who don't understand the seriousness of inside trading, but not knowing the law does not mean won't get thrown in prison.