Barnes and Noble (B & N) provided a fascinating example which reminded us of Novell. Back in the days Novell took Microsoft to court, but many years later, as Novell had more things to sue over (e.g. Samba, not just WordPerfect) Microsoft passed a large bribe to Novell and said goodbye to litigation, undermining Samba's case in Europe. Similarly, Microsoft basically bribed B & N to drop the legal case that was challenging extortion of Android. Barnes & Noble is now in trouble. Like, who didn't see that coming? See some of the details in [1]. Making Windows pledges is a very bad strategy these days.
Redmond pumped $300m into Nook back in 2012, in a deal that gave it a 17.5 per cent stake in B&N's underperforming e-book subsidiary. In exchange, Nook agreed to develop a branded reader app for Windows 8 – which it did – and another for Windows Phone, although the latter has yet to appear.