Most companies that offer ‘free shipping’ increase their item prices to compensate.
So long as the total cost paid is something you’re aware of I think it’s a perfectly valid (and more transparent) way of doing business.
Also I love Novelkeys because they have a logistics team who can offer prepaid Fedex shipping so I don’t have to deal with surprise brokerage, duties, or sales taxes when my shipments arrive to Canada.
The reason it’s not a universal mod is that cherry/Gateron tops have much looser stem tolerance compared to gazzew switches.