Here's one of my favorite (old) articles on their transition from being gaming nerds to becoming a large corporation:

Death to the Minotaur: How Wizards of the Coast sacrificed its geeky, Gothic, sex-for-all idealism for Pok March 23, 2001 https://www.salon.com/2001/03/23/wizards/

There's been 2x as much time between today and that article, as between that article and WotC's founding. It's not relevant to the issues today, and the author paints an extremely rose-tinted picture of the period. The people he accuses of ruining the company's vision were also early employees (and although the author couldn't know it, would go on to found Paizo and today be the heir apparent to his presentation of WotC's vision).

On the geeky side I really really like the slightly more complicated Adnd 2e as well as the Planescape/Spelljammer settings.

io9's take on this response from wotc - https://gizmodo.com/dungeons-dragons-ogl-license-wizards-of-...

This should be the link