Slow down there Critical Thinker. You can't consider such fundamental questions while creating clickbait.
"Apple Employees buy a home in SJC before iPhone launch" "Goldman Sachs Employee buys home in TriBeCa during bonus season" is not something you read regularly.
Additionally, this is talking about a macro trend across an industry, while the current article is talking about 2 employees out of hundreds of thousands.
The article from 15 years ago is also not discussing the legality.
I trust you can do the math from here.