When Microsoft shut down its eBook store, you could no longer read the eBooks you purchased. They did refund their customers. https://www.bbc.com/news/technolo

When Microsoft shut down its eBook store, you could no longer read the eBooks you purchased. They did refund their customers. https://www.bbc.com/news/technology-47810367 https://www.bbc.com/news/technology-47810367 Also, there are examples where a company arbitrarily changes its DRM - like when Microsoft launched its Zune media player, it wouldn't play their own "Plays For Sure" DRM music - they just dropped support. https://en.wikipedia.org/wiki/Microsoft_PlaysForSure https://en.wikipedia.org/wiki/Microsoft_PlaysForSure