Had to fix up mum's laptop and she wanted Windows 10 with all the Microsoft Office gubbins (she had to settle for Libreoffice). Didn't want a word of anything Linux because "it might not work with any of my stuff". I don't know of a single thing she does outside of web browsing and typing up word documents.
Harvesting and selling personal information is practically a continual source of funds with little to no cost. Why spend time and money developing a product with all the data harvesting elements stripped out to appeals to maybe 5-10% of the market?
It would be nice to see a few more distro options for GPD's machines, especially considering Ubuntu MATE is the only real option for ones like the Win 2. Anything else is a pain to install due to all the weird hardware they use.
Probably, she uses Windows 10 at work.