Microsoft milks Casio for using Linux: https://www.theregister.co.uk/2011/09/20/signs_deal_with_casio_for_undisclosed_sum/ https://www.theregister.co.uk/2011/

Microsoft milks Casio for using Linux: https://www.theregister.co.uk/2011/09/20/signs_deal_with_casio_for_undisclosed_sum/ https://www.theregister.co.uk/2011/09/20/signs_deal_with_cas... And there are many more companies they've sued for using Linux.