A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
Unity makes the cool Blacksmith demo, then uses Mr. Porn-Tache for the front page? I don't think it's funny or edgy, it's just laughable.
Teila mentioned the education market... this is a big point. Quark used to be king of the DTP space, Adobe gave InDesign free to educational...