I mean, an IPO is a pretty reasonable point to allow insiders to trade. You’ve just published a huge amount of information about the company, so the insider advantage is at a relative low. It’s somewhat common for blackout periods to exist prior to things like earnings announcements, but after the announcement is usually when trading is permitted.
It’s seemingly closer to $6b for that year, which is obviously a ton of money, but considering they employ north of 50,000 people, if each person costs them $75,000/yr that’s already $3.75b. NYC spends $2b on just their department of sanitation. It’s a city with like 8.5m people, everything costs crazy amounts of money.
https://council.nyc.gov/budget/wp-content/uploads/sites/54/2021/05/NYPD.pdf
https://council.nyc.gov/budget/wp-content/uploads/sites/54/2021/05/DSNY.pdf