[KwasiOwusu]

"There's no need. They know it and their customers know it."

Only reason they don't is because they can't.
They have no idea where their stolen code came from. LOL!

Plus of course most of their potential and lots of their existing costumers in fact do NOT know they they are safe from patent and IP challenges.
This America, the world champion of litigation.
If your software vendor is not giving you protection, someone is gonna come after ya.
Meanwhile, Microsoft is gleefully raking in record revenues from Windows servers in part from pointing this out to potential Linux costumers and swinging them over to Windows.

[ShadowAce]

They have no idea where their stolen code came from. LOL!

Wrong yet again. (This is getting too easy!)

Open source methodology includes full histories of where each line of code originated from, including author's name, and verification process.

Do you know the name of the MS engineer(s) who wrote Notepad?

[N3WBI3]

They have no idea where their stolen code came from. LOL!

The author of every piece of Linux code is known..