A recent study by the University of Oslo has shown that the share of desktop Linux users it would go from 2 to 40% if there were no piracy in Microsoft Windows. You have the original link of the study in this link which you can see if you know English.
This study shows what many of us suspected, that piracy, something Windows has struggled against for years, it really benefits them, because thanks to the fact that you can get this operating system for free, fewer people use Linux.
If you look closely and have used Microsoft's system for years, you may realize that it doesn't really matter that much to have an original version of the operating system or a pirated version, since using pirate triggers like Kmspico and by downloading the updates you want manually, you can have an identical license to the original in almost everything.
The bad news is that there are still many users who are afraid of change, who prefer to continue using pirated Windows to try a Free, legal and free Linux operating system. Although it is true that operating systems like Linux Mint have done a great job in terms of familiarity and adaptation to the new user, there are still people who are scared to switch to Linux.
In addition, today Microsoft's policy has changed, which They have gone from charging you 100 euros for a Windows XP to giving you a Windows 10, something that happens even if your copy of a W7 or W8 is pirated. However, as we saw in this article about Windows 10, everything has a price and many users who appreciate their privacy do not want to upgrade to Windows 10, preferring a pirated version of it
In my opinion, you should start teaching people to use and appreciate Linux, because even if a pirated Windows replaces the original quite well, it is always risky to have an unsupported system, something that does not happen with Linux, in which you will always have free support.